I, without any personality, become a hero!

Of course, Midoriya said no problem, that's OK. If you get damaged again next time, I'll still help you fix it.

Genos immediately vowed to himself that he could never be careless again, lest he wake up next time to find himself turned into a drill.

After the restoration and modification of Genos is completed, Izuku Midoriya will need to prepare for two things.

The first thing was the visit of the Hero Association. After the Grim Reaper instantly defeated Deep Sea King, Izuku Midoriya's popularity skyrocketed. Many people saw the video of him at the J City shelter circulating online. The name "Dr. Hell" became deeply ingrained in people's minds, and even his famous All Might line at the time—"It's all over! Why? Because I came!!"—was memorable.

This line is now considered the best hero's line, and it has inspired many heroes to design their own entrance lines. After all, who wouldn't like someone who comes to the rescue in a crisis and says a cool line?

After the incident in J City, high-ranking members of the Hero Association visited Izuku Midoriya, hoping he would join the Hero Association and become an S-class hero. This time, Midoriya did not directly refuse... he simply said he needed to think about it and then avoided the matter for the time being.

Because this time, Midoriya really needs to think things through carefully. First, the "Doctor Hell" who made his appearance in the Deep Sea King incident has become known to the public. In addition, the Plague Messenger Po has caused serious damage to J City, which makes Midoriya have to establish his own course of action.

Having been unexpectedly dragged into this world by the Grim Reaper, and having learned that the existence of "monsterization" causes great suffering to ordinary people, Midoriya plans to thoroughly research the principles behind the birth of "monsterization" and suppress it. On the other hand, he also has a lot to learn from Dr. Kuseno, so Izuku Midoriya plans to stay in this world for a long time.

Because Izuku Midoriya has unexpectedly become widely known, especially since the title "Doctor Hell" was given to him directly, just like the previous "Steel Wire Reaper," he also considered responding to the enthusiasm of people in this world.

Just as All Might once said, when people in need place their hopes on you, as a hero you should respond to them.

So, Izuku Midoriya had already decided what to do next. First, he called the Grim Reaper, this lazy bum who did nothing all day, to his side. Then, Midoriya took the initiative to contact the Hero Association.

"Dr. Hell, have you made up your mind?"

The high-ranking members of the Hero Association anxiously awaited Izuku Midoriya's reply. After all, as a genius scientist capable of creating "Dragon-level" monsters, his willingness to become a hero would be incredibly good news for the Hero Association.

"Yes, I've made up my mind."

Nodding, Izuku Midoriya gave his reply to the bearded man on the communication device:

"I accept your request and will join the Hero Association to become a hero."

"That's wonderful!!"

"I haven't finished speaking yet."

Before the bearded man could even get excited, Midoriya interrupted him abruptly.

"I did agree to join the Hero Association, but it's the association that's doing the hero activities in my place!"

Midoriya pointed to the Grim Reaper standing to the side, while the jet-black bald man seemed somewhat confused. So, Master had called him in to entrust him with an important task, and this was it?!

"But... wouldn't it be a bit... a bit... to have an oddball act as a hero?"

Before the bearded man from the Hero Association could finish speaking, Izuku Midoriya decisively interrupted him.

"You can't expect me, a scientist, to go up and fight monsters, can you? 'Metal Knight' also remotely controls robots to perform heroic tasks."

"That's true."

Having said that, the bearded man agreed with Izuku Midoriya's words. It was really too much to ask a scientist to fight monsters. It was already a good thing that he agreed to join the Hero Association. He shouldn't take advantage of the situation and then complain.

"Master is clearly incredibly powerful..."

The Grim Reaper was muttering to itself nearby, but Izuku Midoriya simply flicked his finger and a steel wire silently pulled it aside. He couldn't let this thing reveal its secrets at a time like this.

After Midoriya and the Hero Association reached an agreement, he planned to personally take Hellbringer to the Hero Association headquarters next week. After all, it was his first time as a nominal S-class hero, so he had to make an appearance.

"Come here, I have something for you."

After disconnecting the communication device with the Hero Association, Izuku Midoriya beckoned to the Grim Reaper crouching beside him. The creature immediately pounced on him like a husky, seemingly excited to hear that Midoriya was going to give it something.

"Wear this on."

A red cloak was given to the Grim Reaper by Izuku Midoriya. Although it didn't know what its master's intention was, it immediately put the red cloak on itself.

When the red cloak was put on by the Hellbringer, it seemed to become one with him, moving without wind, and the Hellbringer could feel his power greatly increased.

"This is!?"

The Grim Reaper looked at Midoriya with some surprise, and his master spoke:

"Didn't the 'monsterization' research make a breakthrough recently? This is a new piece of equipment created using your original construct, which can greatly amplify your power."

"Besides, you're going to be acting as a hero soon, so you should at least have a cape."

Seeing the Grim Reaper who was so surprised he didn't know what to say, Midoriya smiled without saying a word and added:

"Let's call this the 'Hero's Cloak,' because it's made from your original construct, so it will respawn on you even if it's destroyed."

Midoriya has made a breakthrough in his research on "monsterization," and he has first and foremost fulfilled the wish of the Grim Reaper, who has always hoped to increase his power to defeat Saitama.

After being worn by the Hellbringer, the "Hero's Cloak" activated the "monsterization" factor and became part of its body. This cloak can be hidden away normally, and can be actively summoned during battles and hero activities.

"Master! Thank you so much!!"

"Stop with the useless talk and just go and do the heroic work for me."

Ignoring the gleeful Grim Reaper, Midoriya shook his head and continued with his work... After all, he created the Grim Reaper himself, so you could say he was his own child.

Next is the second thing Midoriya is going to do. He has made a breakthrough in his research on "monsterization", so he wants to actively create and activate a third "monster".

"Then let's prepare to begin the experiment."

PS (Author's Note):

Actually, the jet-black egg-shaped Hellbringer was originally based on the cosmic demon Rosh... because the transdimensional character is so cool, I couldn't resist borrowing the name.

Honestly... I've ruined my image, haven't I?

Chapter 27 Rubik's Cube

Yawning, Saitama was exhausted today. He had been fighting against a group of incredibly powerful middle-aged women during a limited-time discount sale at the supermarket, and he was completely worn out. This was even more tiring than fighting monsters normally.

Or perhaps in Saitama's mind, the only people who can be called his rivals are the middle-aged women who compete with him for shopping, people who even Saitama, who can defeat any monster with a single punch, must admit defeat.

However, Saitama still managed to snag some discounted eggs today, so it was a worthwhile purchase.

After returning home, Saitama took a shower, changed into his pajamas, and was about to go to his room to sleep when he opened his bedroom door and was shocked to find that he was not in his own room.

"Yo! Saitama, let's fight!!"

With his red cloak billowing as if it were alive, the Hell Messenger, whose aura was far stronger than ever before, declared to his nemesis.

After rubbing his eyes, Saitama took a few steps back and closed the door. Once he was sure he was still in his own home, he opened the door again.

"Saitama, are you trying to escape?!"

The imposing messenger of hell pointed at Saitama and roared before lunging forward, but its fate was predictably sealed by a single punch.

Saitama, who had pulverized the Grim Reaper with a single punch, rubbed his forehead and asked Izuku Midoriya, who was recording data beside him, a question.

What weird thing are you up to now?

Stepping from his own home into an unfamiliar place, with both Izuku Midoriya and the Grim Reaper there, it's obvious who the culprit is.

"I'm testing the new 'weirdo's' abilities. How about it? Isn't it convenient?"

"Have you created another new 'weirdo'?!"

Saitama, immediately grasping the key point, still vividly remembered the previous troublemakers. Now, Midoriya had created another one who would cause him trouble?!

"Yes, there was a breakthrough in research recently, but we can't completely call him a 'weirdo'."

Pointing to the Rubik's Cube floating in the air, Midoriya answered Saitama's question.

"Huh? Something completely different?!"

Saitama, whose interest was immediately piqued, noticed that the Rubik's Cube that Izuku Midoriya was pointing to had only two colors: black and white. It was even floating in mid-air, defying gravity, and it was constantly changing and rotating. From its appearance, it looked like a high-tech product.

"Its name is 'Hyperspace Cube,' and it should essentially be considered a mechanical product."

"So you're saying it connects my room to yours?"

"Hmm, this ability is amazing, isn't it!"

Seeing that Saitama was very interested in his new creation, Izuku Midoriya patiently explained to him what the "Hyperspace Cube" was.

After finding the Black Mist's "portal" really useful in his original world, and considering that Izuku Midoriya had recently personally traveled and run errands twice, he decided to create a new "portal" first.

Fortunately, Dr. Kuseno has this technology. You see, Izuku Midoriya was able to come to this world entirely because of the inter-world teleportation device that Dr. Kuseno created at the request of the Grim Reaper.

However, Dr. Kusno's technology is still immature. Opening a portal requires a huge energy supply, and it is easy to overload and break down after being opened once. Therefore, it is unlikely that you can open a "portal" to travel in daily life.

However, after Midoriya made a breakthrough in mastering "monsterization", he asked Dr. Kusno to create a prototype of a "teleportation device" and then used the "monsterization" technology to activate the core, thus giving birth to the "Hyperspace Cube".

Strictly speaking, this is actually an intelligent robot. After Midoriya absorbed the rationality issues of the "Hair Growth Potion Monster" and the "Plague Messenger," this time he only activated the core as an enhancement ability, without giving too much rationality to it.

The intelligence was developed by Dr. Kusno. While it's impossible for it to think like a human, it can perfectly execute most commands.

In addition, Midoriya only conducted a small-scale "monsterization" experiment on the core this time. Just like Saitama is worried about being caused trouble by monsters, Midoriya is also worried that another rational monster might emerge, and who knows what kind of trouble it might cause.

Therefore, the "Hyperspace Cube" retains its original appearance and has not been transformed into a monster, but its abilities have been greatly enhanced.

First, as Saitama saw, it was able to connect two different spatial nodes, so when Saitama opened the door to his own room, he was directly transported to Dr. Kusno's research institute.

We won't go into too much detail about the other functions and effects, but Saitama felt that it was alright this time, because it seems that the "monster" created by Izuku Midoriya will no longer cause trouble for him.

"Damn it, how did I still get instantly killed?!"

The indignant Grim Reaper returns from the dead. He's clearly wearing the "Hero's Cloak" and his power has increased greatly, so why did Saitama still kill him with a single punch? That's too much!

"Let's not dwell on this for now, and work on it slowly in the future."

Midoriya, the messenger of hell, offered appropriate comfort, though he had guessed this would be the scene, because Saitama was truly strong... the kind of strength that could truly be called "invincible".

"I'm exhausted, I'm going home now! Today was a complete defeat."

Frustrated, Saitama was about to return home when the Grim Reaper suddenly appeared in front of him, blocking his path. It looked as if the sky had fallen and asked in terror:

"How is this possible! Saitama, you actually lost! Who on earth could defeat you?!"

Although it was a bit embarrassing to say, Saitama still scratched his head sheepishly and told the Grim Reaper.

"I was outdone by the aunties and grandmas in Z city during the supermarket's limited-time discount sale. I was lucky enough to manage to snag some discounted eggs."

"Wow! The fighting power of these middle-aged women is terrifying!"

The messenger of hell gasped in shock and immediately made a decision.

"Saitama! Take me with you next time there's a limited-time discount at the supermarket, I'm going to beat you!!"

"Okay, remember to help me buy more items then."

Saitama immediately agreed, saying that he couldn't possibly grab all the discounted items by himself, and having another monster would allow him to buy even more.

Midoriya rubbed his forehead, indicating he didn't want to say anything. He figured if the Grim Reaper wanted to play with Saitama, so be it; he could finally have some peace and quiet.

Time flies, and the scheduled date for next week has arrived in the blink of an eye. As promised, Izuku Midoriya has brought the Grim Reaper to the Hero Association headquarters. Even though he plans to have the Grim Reaper help him with hero activities, he still needs to show up and register since it's his first time.

The Hero Association headquarters is located in a huge black building in City A. It is said that this building, constructed of special materials, can even withstand a nuclear attack, but no one has ever actually tried it.

When Izuku Midoriya and the Grim Reaper arrived, their figures were spotted by enthusiastic people from afar. Citizens took out their phones to take pictures or offered words of greeting and encouragement.

After struggling to escape from the enthusiastic citizens of City A, Midoriya and the Grim Reaper encountered an unexpected obstacle after entering the Hero Association headquarters.

"Hey! What are you doing at the Hero Association, you bald-headed jellyfish?!"

A green-haired little girl, floating in mid-air and reaching the same height as the Grim Reaper, could easily be mistaken for Izuku Midoriya's sister if not many people knew her identity, simply because of her hair color.

Chapter 28 The Trembling Tornado

The green-haired little girl blocking his way was someone Midoriya actually knew... Of course, she couldn't be his sister or anything like that, and this seemingly little girl was actually much older than him.

She is none other than "Tornado of Terror," the second-ranked S-class hero in the Hero Association, and according to reliable sources, she is also the older sister of "Fubuki," the first-ranked B-class hero.

After all, they are S-class heroes who are the pillars of this world. It is not surprising that Izuku Midoriya would gather information about them in advance. In fact, collecting gossip about heroes is already an instinct for Midoriya.

Izuku Midoriya knew why "Tornado of Terror" was so aggressively blocking his and Hellbringer's path. After all, this was the main reason why "Hellbringer" was rated as a "Dragon-level" monster by the Hero Association.

Before he came to this world, he heard the Hellbringer say that when the Hero Association dispatched heroes to eliminate it as a threat, it knocked out heroes below S-rank and that was it. In the end, the Hero Association sent its strongest fighting force, the Trembling Tornado.

Although "Tornado of Terror" successfully defeated and destroyed the Hell Messenger, this guy had an immortal body that could revive no matter how he died. In the end, Tornado didn't kill the "Hell Monster" and instead got exhausted herself.

Although she was the victor on the surface, it was still embarrassing enough for her to retreat because she was an invincible monster. From then on, Tatsumaki held a deep grudge against a certain black-haired man.

Now, after Little Tornado launched into a barrage of sarcastic remarks about the Grim Reaper, she turned her attention to Izuku Midoriya.

"Hey! I heard from people in the Hero Association that you created this jet-black bald head, right?!"

"That's right. Did it offend you in any way?"

Midoriya responded to Tatsumaki with a gentle smile, leaving Tatsumaki speechless, who had been looking for something to criticize him.

You can't exactly say, "I can't kill the black bald head you created, so I'm really angry and want to cause you trouble."