Please play Fate/Go with me.

Just then, Chaldea was suddenly invaded by monsters. As if blinded by hatred or gone mad, the red-eyed monsters attacked Chaldea recklessly, and behind them seemed to be the shadows of corrupted Heroic Spirits and human evil beasts.

Chaldea is once again facing a huge crisis, and the Servants who remain in Chaldea are barely holding off attacks from multiple directions.

Leonardo da Vinci, as the temporary commander of Chaldea, gathered all the Holy Grails and developed an item that could sustain the existence of Servants, a mobile game called 'FGO'.

Mash was transported from Chaldea by Leonardo da Vinci during this great crisis and came to this special world.

There are three instructions from Leonardo da Vinci: to investigate the source of this incident, to spread the FGO strategy, and to find allies who can fight against these monsters.

"Spread the word about FGO, and go find Shirou Emiya!" These were Leonardo da Vinci's final instructions to them.

Three worlds were observed to be related to this event. Given the increasing instability of the current spirit particle transfer device, there was no longer any way to resolve one world and then return to enter the next. Therefore, Mashu, Gudako, and Fou, who had regained their senses, were each transported to a different world.

So Mash, carrying a mobile game made from the Holy Grail, came to this world alone, promoting the game while searching for Shirou Emiya.

As the only being in this world who can currently contend with these monsters, Mash is forced to transform into a Demi-Servant to fight them. Initially, she only faces ordinary werewolves and skeleton soldiers.

But later on, monsters like the Demon Boar, Eyeball Monster, and Wyvern also appear. There is a high possibility that there will be even more terrifying monsters in the future, making it increasingly difficult for her to fight as a single Shield-class character.

Whether for personal or professional reasons, Mashu hoped to persuade Shirou-senpai to join the team as soon as possible.

“The monsters that are appearing now are getting higher and higher level, and it’s becoming increasingly difficult for me to defeat them on my own, so I have to ask you for help, Shirou-senpai!” Mash said.

"Then what should we do?" Shirou asked directly.

"Huh? Senior, would you be willing to help?" Mashu asked in surprise.

"Of course! I can't let such a monster wreak havoc on the world! And how could I let you face these dangers alone!" Shirou replied matter-of-factly.

Over the course of several months, he realized that although the girl in front of him was sometimes a bit eccentric, she was actually a very pure and kind girl. Whether as a senior or as a friend, he hoped that the girl could find happiness.

“Senior…” Hearing Shirou’s words, the girl blushed and looked at the boy with great emotion.

She felt a warm glow in her heart; he truly was someone she could trust unconditionally.

"Thank you so much, Shirou-senpai!"

If there is anything in this world more pure than "I love you," it must be "Even if hell lies ahead, I will be with you."

Chapter 08 Please play FGO with Matthew

Mash Kyrielight is actually a member of Chaldea, an organization from another world that ensures the survival of humanity. On the night she returned to Chaldea with her Master Gudako after humanity was restored, the world experienced another inexplicable anomaly.

At that time in Chaldea, Leonardo da Vinci observed through Sparrow that the future of the world was rewritten and discovered three parallel worlds with very special reactions.

There are three key points that serve as clues. They are different from singularities and Lostbelts. They are more like parallel worlds where some special secret is hidden. Mashu, Gudako, and Fou were transported to different worlds.

"Although we've only just restored the human system, and I should have let you two rest for a while, I didn't expect another problem to arise. Gudako! Mashu! Can I ask you for help?" Da Vinci asked, looking up at the two girls as she operated the system.

"I understand! Da Vinci, leave it to us!" The playful girl with orange-red hair tied in a side ponytail and dark gold eyes patted her chest and agreed.

“Yes, Da Vinci, Gudako-senpai and I are ready!” Mashu said with a smile.

"Fou~!" Fou climbed onto Mashu's shoulder and called out.

Inside the ring-shaped celestial device, the 'sphere of light' flashing with electric arcs, mimicking the Earth environment model Chaldea, was slowly rotating. Da Vinci was operating the spirit particle calculation device. In a room flashing with blue light, Mashu and Gudako stood together on the teleportation array, their fingers intertwined, gazing at each other.

"Mash, if anyone finds Emiya-senpai first and solves the problem in that world, then we'll find a way to go find them! It's a promise!" Gudako said to the pink-haired girl with her usual smile.

“I understand! It’s a promise, Senpai!” Mashu replied with a smile.

"Fufu~!"

"But Da Vinci, won't it be a problem if you and everyone else stay here? What should we do after that?" Gudako asked.

"Are you worried about me? I'm an all-powerful genius. Even if I'm killed once or twice, I can still survive. I'll protect this place, so you can go ahead and do your work without worry!" Leonardo da Vinci said confidently, flashing the Mona Lisa smile.

"Okay!!" Gudako and Mashu replied.

“Because the spirit transfer device is already very unstable, there’s no way to return here and teleport to the next world. So you have to split up. Go find Shirou Emiya. There are signs of him in that world. As the first Heroic Spirit to disappear, there must be some clues on him!” Da Vinci said, pressing the teleport button.

The spirit transfer was activated, and a dazzling light flashed as the two girls and a beast were drawn into a deep blue swirling vortex.

So Mashu came to this world alone and contacted Leonardo da Vinci. Leonardo, as expected of one of the giants of the Renaissance and an all-powerful genius, came up with the most suitable way to promote this world just by speculating.

More than a dozen Holy Grails serve as bridges between this world and Chaldea, connecting the Heroic Spirits of Chaldea through the mobile game. As they gain the recognition of humanity in this world, the Heroic Spirits will gradually regain their energy.

Mashu began to learn about the world while promoting the FGO mobile game and seeking out Shirou Emiya. However, the world had changed so much that its peace and perfection surpassed any civilization she had ever seen.

At first, Mashu, who had no idea what to do, searched for information like a headless fly, and encountered many embarrassing situations.

Fortunately, the Holy Grail in the mobile game provides magical power, allowing her to become a Demi-Servant and rebel. Otherwise, she would have encountered several strange men who wanted to take her to luxury hotels and hot springs, which she firmly refused. Of course, if she encounters unreasonable men, she can simply knock them unconscious with the back of her greatsword and hand them over to the police.

After a year, Mashu finally began to grow under Leonardo da Vinci's guidance.

Under Leonardo da Vinci's guidance, Mashu founded a company, hired professional managers, and worked tirelessly every day to promote the Fate/Grand Order (FGO) mobile game, striving to make it a global phenomenon. In this great undertaking that brought joy and inspiration to countless FGO fans, she also incidentally made some money.

As the largest shareholder of Type-Moon, who is hiding behind the scenes, Mashu will rise to prominence in the business circles of the China Alliance in Asia and Africa in due time. The emerging company that suddenly takes off in the game industry has attracted a lot of attention, but no one knows the largest shareholder here. The true identity of the mysterious genius president girl who has become famous with her identity is her.

Type-Moon is doing very well, but Mashu still can't find Shirou Emiya. She hired people from all walks of life and searched several nearby countries, even looking for anyone with the surname Wei, but she still couldn't find her senior.

Until one day, at the National Middle School Sports Competition, she saw a black-haired boy who stood out from the crowd, displaying the aura of an archery master. His appearance seemed familiar, yet his temperament was so unique.

The moment he entered the archery arena and drew his bow, his back was as straight as a target, his hand drawing the bow and the arrow forming a horizontal line. The boy's expression was calm and composed; even before he released the arrow, it was as if he was already destined to hit the bullseye.

The boy was now far ahead in the score; if his next arrow hit the bullseye, the championship would be decided. The other contestants wore tense expressions and broke out in a cold sweat.

Swish!

The audience fell silent, and Mashu was also stunned. The boy's archery posture was like a work of art, giving people a sense of beauty in harmony with nature. However, this archery posture also gave her a familiar feeling.

A moment later, enthusiastic shouts rang out.

Although this boy's temperament and height were different, the aura he displayed at the moment of shooting an arrow was exactly the same as that of the Archer-class Heroic Spirit Emiya-senpai, whom she had fought alongside before.

Mashu realized that the other person was the target she was looking for.

After investigating, Mashu learned the other person's identity. It turned out that the other person's surname in this world was Hachiman, which explained why she had been unable to find him.

So the company contacted the school and used its connections to bring Mashu to Huameng International High School as a transfer student. She joined the archery club and became Shirou Hikigaya's junior.

Only then did all these things happen. Although Shirou Hikigaya and Emiya Emiya are different beings, Mash felt a greater and more touching warmth from this new senior. The loneliness and emptiness she felt after being separated from Gudako for a year seemed to be filled at this moment.

"Mash! If it's something this important, you should have told me from the beginning. Acting alone is too reckless," Shirou said, looking at the pink-haired junior with a hint of reproach.

Even if a girl has the ability to fight monsters, she shouldn't risk her life alone.

"Shirou-senpai, if you hadn't genuinely accepted this mobile game, you wouldn't be able to see these monsters in the video. Accepting FGO is like accepting a ritual, a contract with Chaldea."

Before accepting this contract, humans, protected by this world, will keep all the 'mystery' out of their sight.

The collective consciousness of this world is incredibly protective of humanity, almost never allowing the mystical to interfere in human affairs. 'Magic,' 'Servants,' and 'invading monsters' are all kept out of the world in an alternate dimension.

"Even if I told you the truth before, your brain would distort it into something else when it received that information, like turning a monster invasion into a natural disaster. So you can't possibly believe what I'm saying, senpai," Mashu explained.

"Is that so? I'm really sorry I couldn't help you in time!" Shirou expressed his understanding, but he couldn't help feeling guilty. He knew very well what it was like to fight alone in the face of danger.

"No, it's more accurate to say that it was my fault for dragging you into this, senior." Mashu slowly shook her head.

"I understand. Then we're even. From now on, if you need any help, be sure to tell me, understand?" Shirou reminded the girl again.

"I understand!" The girl, deeply moved, had approached him with ulterior motives, only to be so readily accepted.

"I understand!" This was the boy who chose to trust his junior, understanding her kind nature, and decided not to let her feel lonely anymore.

The two, having reached a tacit understanding, looked at each other and smiled.

Chapter 09 Playing FGO is Justice

"Anyway, let's deal with this problem first," Shirou said to the pink-haired girl.

“Okay, please look at this.” Mashu nodded obediently and took out her phone, where a map unfolded on the screen.

The image above shows a panoramic view of the Tokyo metropolitan area, marked with several red circles of varying sizes, one of which is moving, while others are marked with black crosses.

“You should know where these places marked on the map are, right?” Mash asked.

Shirou looked at the place names and nodded, replying, "Yes, these are all places where accidents happened..." He remembered them very clearly because he had always been concerned about these accidents.

"Shirou-senpai is right, these are the locations where disasters have occurred. These markings were created by the observation devices of my organization, 'Chaldea,' based on the magical reactions of the monsters. The larger the red dot, the higher the danger level."

The areas marked with an "X" are the alternate dimensions I've already dealt with, while this newly appeared large red dot is moving. The day before yesterday it was Minato Ward in Tokyo, the day after that it was Chuo Ward, and yesterday it was Shinjuku. If I'm not mistaken, this monster will appear in Chiba today! And judging from this magical reaction, this monster is likely to be a huge one.” Mashu said, drawing a line on her phone.

The red dots marked on the map are connected by a straight line, and the path of this large red dot is a diagonal line, which is easy to see at a glance.

"Isn't this near the school? Isn't that very dangerous?" Shirou asked in surprise.

“These fantasy monsters are here for some purpose. This monster with the big red dot seems to be quite intelligent and is probably after me, but there are still many questions I don’t understand,” Mash said.

"Can we predict exactly where the monster will appear? We have to stop it as soon as possible. This is near a school! What if the students here are attacked?" Shirou said, frowning. He had to stop this from happening no matter what.

"Please don't be nervous, senior, everyone is safe. These monsters from another world will be kept out of the world's protective wall in this alternate dimension. This world has a very strong defense mechanism against invasions from outside."

"Moreover, the world will guide creatures away from this dangerous place in various ways. The creatures around will subconsciously sense the danger, or suddenly feel their heart racing, their whole body chilled, or their stomach aches, and then leave this place." Mashu comforted Shirou, telling him not to be too nervous.

"I see." Shirou nodded, then, recalling the unusual events of the day, asked, "If what you're saying is true, the school just let the students go home early, and the other members of the archery club didn't come for morning practice today, so does that mean the school is very likely the location where the monster appeared?"

“That’s very possible! Are you good at deduction, senior?” Mashu asked, her eyes shining with the light of seeing a fellow enthusiast.

"If we fight in another dimension, will we be safe?" Shirou asked.

Mashu shook her head and continued to explain, "No, that kind of destructive behavior is still very dangerous. Once the damage that monsters cause to the walls in the alternate dimension exceeds a certain amount, it will indirectly affect this world. That's why those accidents in the news were like that."

"If an accident occurs in this space and a human dies as a result, then they are truly dead. The dead cannot be brought back to life, nor can they be treated as if they never happened; they will simply become logical."

"It's just that the way someone dies can be twisted by the world into other reasons, like a car accident or a heart attack, but once a person dies, everything is irreversible." Mashu seemed to recall something and said with some sadness.

Seeing Mashu's expression, Shirou understood that the girl might have experienced some sadness, just like him. He had sensed before that she was different from ordinary girls at school; beneath her gentle exterior lay a very strong heart. But it was precisely this kind of strength, which couldn't be possessed without having endured much hardship, that was what made her so heartbreaking.

Oh, I see.

"I understand! I will never let this happen!" Shirou clenched his fists and made a vow in his heart, determined to stay by the girl's side and fight to the end, protecting the happiness of everyone in the school.

"Don't worry, senior! It's alright. Even if someone is accidentally caught up in another dimension and encounters monsters, as long as they're playing FGO, Chaldea will definitely have a way to protect them! Heroic Spirits will protect the Masters they recognize." Mash said with a smile to her senior who had suddenly become enthusiastic.

"Although this world suppresses all mysterious forces, the FGO system, which was specially made by Leonardo da Vinci, comes from multiple other worlds, and was created using more than a dozen Holy Grails, is an exception!"

Players develop faith and affection for their favorite Servants, providing them with the energy needed to exist in this world. In return, the Servants respond to the summons of Masters they approve of or who share similarities and feel compatible.

"So playing FGO is justice! All Masters are allies of justice! Shirou-senpai! Let's go and save the world together!" Mash shouted excitedly.

"Huh... Is that so?" Shirou looked at the FGO game icon on his phone and wondered if it was some kind of cult or pyramid scheme.

At that moment, the preparation bell rang.

"The monster is expected to appear again when no one is at school, so please meet up with me after school! Don't worry, the barrier in this world is very strong, and ordinary monsters might not be able to break through even after two or three years." After saying that, Mashu ran off to class with a relaxed expression.

Shirou was at a loss for words, and could only watch the girl's figure disappear into the distance as she ran away.

'What kind of experiences have they gone through to make this junior so oblivious that they act like they're playing a game at such a serious moment, showing absolutely no tension? And... give me back the emotion I felt earlier!'

After school ended in the afternoon, the teachers and students left the school one by one, and Shirou and Mashu met at the entrance of the archery department.

"To deal with those monsters, all you need is the mobile game FGO! Playing FGO is justice, playing FGO is saving the world! Because Shirou-senpai has had this quality from the beginning! Shirou-senpai is also a first-class powerhouse in my world, and his cooking is one of the best in Chaldea."

"Although there are some problems with the connection between the Chaldea Heroic Spirit Summoning System and the Hall of Heroes, and the Heroic Spirit Emiya in Chaldea has disappeared and has not appeared since, if it is you, senior, you can definitely summon him back from the Hall of Heroes. This will be the Heroic Spirit with the highest compatibility with you, and he will definitely be able to exert a lot of power."

"Transform into a Heroic Spirit, senior! Known as the Nuclear Bomb Sword Immortal, with Unlimited Blade Works activated, he has weapons that counter all attributes, making him unstoppable!" Mashu shouted excitedly. "Archer-class Emiya is so cool! I have to get him to max level! And with the five-star Saber-class Senji Muramasa, wielding his demon sword, who can stand against him? I have to spend all my money on him!"

"Wait! Wait! Mash, I don't have the ability to transform into a Heroic Spirit, and who is this Senji Muramasa? I've never even heard of him!" Shirou called out to Mash, who was excitedly hawking her Heroic Spirits.

"Huh? How could this be? Senior, didn't you summon the Heroic Spirit Emiya? Shouldn't it automatically complete the possession summoning and become a pseudo-Servant?" Mash asked in confusion.

"I'm standing right here, how could I possibly become a Servant? Besides, this is what I drew!" Shirou said irritably, taking out his phone, opening Merlin, and speaking to the girl.

"How could this be!" Mashu exclaimed in disbelief as she stared at the screen. "Senpai, you actually drew a gold card! Five stars! You actually got five stars! And it's Merlin!"

"Hey! Is this the time to be surprised by something like this?" Shirou retorted.

"Did I make a mistake somewhere? I have to contact Da Vinci!" Mashu said with a puzzled look. She had been grinding on this account for so long, and her three-star team of warriors was already complete. She had used up all her Saint Quartz and hadn't even seen a four-star character in the gacha pool. She thought that it must be the account's fault, so she gave the account away.

How come the senior got the European certificate in just one day?

"This is so strange! What's going on?" Mashu looked like she couldn't accept reality.

"No! What's strange is that you're not!" Shirou had experience from his previous life, so he was no stranger to Heroic Spirits, had heard of Chaldea, and had some knowledge of Mythical Species, but he was completely on a different wavelength from the eccentric girl.

Shouldn't this be a tense moment of crisis, facing monsters?

Why does it seem like this girl doesn't take this level of fighting seriously at all?

Just then, the ground shook, the sky suddenly darkened, and deafening thunder roared, sounding just like the roar of a huge beast.