In a crossover anime, the only way to become stronger is by marrying a wife.

"...That's it."

Yui Yuigahama said no more, but blushed and lowered her head. "Then... I'll have to trouble you, Tsukikawa-kun."

Pressed tightly against Tsukikawa Shuu's chest, Yui Yuigahama felt her heart pounding wildly like a frightened deer.

The clothes were soaked with sweat, making the skin-to-skin contact even closer.

The touch was so warm, and not at all unpleasant, that Yui Yuigahama couldn't help but clutch Tsukikawa Shu's clothes tightly.

Then, he strode forward.

The stone steps weren't short, but carrying Yui Yuigahama made the journey much faster, and the others didn't need to slow down to wait for her.

"Let's go." Tsukikawa Shu quickly caught up with Hiratsuka Shizuka and the others who were walking ahead.

Hiratsuka Shizuka and Fujiwara Chika exchanged a meaningful glance, and then followed.

Standing at the end of the stone steps, the group gazed into the distance.

At the end of the stone steps was a flat area, with two main passageways made up of dilapidated houses extending in different directions.

"Which way should we go?" Hiratsuka Shizuka asked.

Tsukikawa Shuu looked around and immediately spotted the largest building in her field of vision.

This is an upside-down castle, entirely black, giving it a sinister appearance.

"That's it."

Tsukikawa Shuu looked at the castle, which was the largest building visible in the field of vision.

Generally speaking, good things are usually hidden in these large buildings.

However, the risk factor increases exponentially in large buildings.

"Are we going there?" Yui Yuigahama shrank back.

Right now, she's just a complete noob, utterly incapable of fighting, and nothing more than a burden.

"Come on, relax. Just stay at school with me."

Hiratsuka Shizuka put her arm around Yui Yuigahama's shoulder and laughed, "When I first traveled with him, I was scared to death, but things turned out alright later."

"..."

Yui Yuigahama glanced at Shu Tsukikawa, then at Shizuka Hiratsuka, and the other two pink-haired girls.

I always felt that the atmosphere and relationships between these people in the inner world were completely different from what they showed in the outer world.

What exactly is the relationship between Tsukikawa-kun and Hiratsuka-sensei?

She finally couldn't help but ask weakly.

Chapter 103 explains what it means to be a chosen one!

"Well..."

Hiratsuka Shizuka thought for a moment, then put her arm around Tsukikawa Shu's shoulder, "Let's just call us husband and wife for now."

"Huh?! You two got your marriage certificate?"

Yui Yuigahama was shocked.

Before this, she had always felt that Hiratsuka Shizuka and Tsukikawa Shu's relationship was ambiguous, and that the two seemed too close, but she never expected it to be like this.

"We haven't registered our marriage, but in this world, that's how we are," Hiratsuka Shizuka said with a smile, pinching Tsukikawa Shu's cheek.

"Then... what about Fujiwara-san and Goto-san?" Yui Yuigahama asked.

“It’s the same,” Fujiwara Chika said with a smile.

"Is...is that so?!" Yui Yuigahama was now completely shocked.

Previously, Hiratsuka Shizuka had been complaining that there were no good men in the world, and she would get angry whenever marriage was mentioned, but now she has found her place.

Goto Ichiri and Fujiwara Chika met during tutoring sessions, and both of these pretty girls had that kind of relationship with Tsukikawa Shuu...

So, that's why Tsukikawa Shuu didn't come back for so long during tutoring that day... Could it be for that reason...?

No wonder Hiratsuka Shizuka, Goto Ichiri, and Fujiwara Chika took turns going to the bathroom back then, and Fujiwara Chika even anxiously stopped Yukino Yukinoshita, who also wanted to go to the bathroom...

Yui Yuigahama realized the reason and blushed slightly.

"It's a long story, but there's a reason for it," Fujiwara Chika said.

Afterwards, as the group walked, Hiratsuka Shizuka and Fujiwara Chika were responsible for explaining the reasons to Yuigahama Yui, as well as the rules of Tsukikawa Shu's marriage system.

"Just by forming a contract, you can gain talent, as well as various skills and resources?"

Yui Yuigahama was still in shock.

"That's not all! Whatever experience you gain, dear, we all gain the same amount of experience," Fujiwara Chika said with a smile.

“Hmm… so that’s how you’re able to survive in the Otherworld,” Yui Yuigahama said.

“It’s not about survival anymore, but we still need to maintain our advantage,” Hiratsuka Shizuka said with a smile.

The roads on Sky Island are made up of floating houses, and the houses are not connected seamlessly; in some places there is a large drop in elevation, and in others there are several meters apart.

If an ordinary person comes here, it won't be easy to get through. First, they'll need to build a ladder to overcome the various obstacles.

However, for Tsukikawa Shu and the others, this was child's play. With their superior physical strength or skills, they could easily jump over it.

However, Yui Yuigahama is an exception.

So, Tsukikawa Shuu carried her as they leaped forward among the broken buildings.

"Hold on tight," Tsukikawa Shuu said.

"Mmm." Yui Yuigahama, her face flushed, replied softly, her arms around Tsukikawa Hiiragi's neck.

She has no ability to survive in this alternate world now, and can only let others manipulate her, otherwise she would not be able to overcome these obstacles.

Congratulations! You have opened a treasure chest and obtained 20 cans of beef.

Congratulations! You have opened the treasure chest and received 20 bottles of Pure Water.

Congratulations! You have opened the treasure chest and obtained 1000 Refined Ore.

……

Along the way, the group will also find many treasure chests as they pass through various houses.

Moreover, most of the items you get from treasure chests are pretty good.

Food and water are necessities; otherwise, you won't survive during the time the secret realm is open, no matter how strong your abilities are.

Tsukikawa Shu and the others obtained these essential items at the beginning.

"These things should last for seven days."

Hiratsuka Shizuka was somewhat surprised to see the food piled up on the ground.

With the system's inventory available, and since everyone's level is high and the inventory space is large enough, all these items can be put into the inventory, so there's no need to worry about running out of food for the rest of the exploration.

This time, everyone's luck was off the charts when they entered the inner world.

This must be the effect of the "Chosen One" talent. Tsukikawa Shuu pondered.

Luck is a rare and precious thing, and also the most valuable thing.

At this moment, if you open the system chat group, most of the people in it are in high spirits.

"There's quite a lot of refined ore here; you can actually find two pieces in a regular treasure chest!"

"Five treasure chests of excellent quality or higher, and ten treasure chests of rare quality, what a bargain! My ordinary weapon finally has hope of being upgraded."

"I actually found a piece of moldy bread on the first day! Waaah, at least I can get rid of Ed's curse and not have to go hungry for three days straight at the start."

"A weapon! Although it's just a regular piece of equipment, I finally got a weapon! At least I don't have to be chased by those low-level bugs anymore."

……

Although Tsukikawa Shuu didn't care about what these people got, the treatment inside the secret realm was much better than in the outside world, and the items from the treasure chests were much better.

However, the chances of some unexpected events are much higher.

On this sky island, you can't move forward quickly without maxing out your parkour skills.

The houses are scattered among each other, some cramped together, others far apart. You need skills like jumping, climbing, or flying to get around, or you can only honestly make tools.

"Although we haven't encountered any particularly strong monsters, isn't this parkour too dangerous? I don't have any flying skills, so if I fall, I'll die!"

"Waaaaah, is there any kind person who can help me? Is there a ladder or something? I've fallen into a room and can't get out, but there's no staircase in this room."

"Damn it. There were even traps here. The floor cracked, and I almost fell and died."

……

In comparison, Tsukikawa Shu and his group went the furthest, which was quite lucky, as the road they traveled was relatively smooth and they did not encounter any traps or monsters.

I did manage to open quite a few decent treasure chests.

In addition, you also need to guard against various hidden monsters, or mimics that specifically lurk in treasure chests to attack players.

However, if players are not careful, they won't float in mid-air like these houses; once they fall, they will be gone without a trace.