On my way back to the classroom, I looked through the letter that Katagiri Mai gave me.

The cover of the letter was blank, and so was the back.

Inside the envelope was a folded piece of paper with only one sentence written in the middle.

- Tomorrow, after school, on the roof of building two.

There was no date, no name. This letter, without a title or a signature, was more like a note than a letter.

Why go through the trouble of using letter paper and envelope just to say one sentence?

The conclusion was simple: the person who wants to see me is not Katagiri Mai, and this person doesn't want to reveal their identity until they see me.

What could it be?

I'll find out when I go.

I kept the letter and returned to the classroom.

The rest of the afternoon was filled with normal school life - going home with Uesugi Yui, picking up Uesugi Yuuki and Koga Mizuo on the way, helping Uesugi Yuuki and Koga Mizuo with their homework at home, and then enjoying dinner together.

It should have been that way.

But today, there were two additional guests at the dinner table, or rather, VIPs.

Souren Manranyama and Bon.

There was a noticeable difference between the usual family dinner table and the one with guests.

Each family has their own unique differences, but there is one thing that should be the same - the casual atmosphere at the dinner table.

Of course, there was still laughter and joy. After all, Souren Manranyama was a welcome guest in the Uesugi family.

But since they arrived this morning until now during dinner, Souren Manranyama didn't say anything to me.

She must have come to the Uesugi family for more than just a temporary stay.

Instead of Souren Manranyama coming to find me, it was Bon, who hadn't been very proactive in contacting me, who spoke to me in the living room after dinner.

"Ziongzong, please come here for a moment."

Oh? Bon, the little witch from the treasure box, actually came to find me proactively. What a rare sight.

By the way, the nickname "little witch from the treasure box" was just a temporary one.

"Sure, but you have to tell me what it's about first."

If you're wondering why I'm being cautious, it's because although Bon is currently dressed nicely, she's also holding a bath towel, hairpin, and a pile of pajamas in her hands.

It shouldn't be difficult to guess what she's about to do, right?

"Miss Souren wants to speak with you, it's an important matter."

Bon answered me with her usual poker face, devoid of any emotions.

I see. Then let's go.

What needs to happen will happen eventually.

I followed Bon out of the living room, through the hallway, past Uesugi Yui's room, past Uesugi Yuuki's room, past Mr. and Mrs. Uesugi's room, past the bathroom, and arrived at the door of the bath.

The bathroom?

This doesn't seem right.

I quickly stopped Bon as she reached for the bathroom door.

"What are you doing?"

Although my thoughts are usually frivolous, I do have some principles. For example, in principle, I try to avoid situations where someone might exclaim, "Oh no, I've been seen! I won't be able to get married!"

Or, in principle, I don't do illegal things.

"What am I doing? I'm opening the door, of course, Ziongzong."

Bon answered my question with a serious expression.

But she didn't answer the crucial point.

"If I'm not mistaken, someone should be using the bathroom right now, right?"

With a serious plan like this, I couldn't use any tricks or rhetoric. I had to speak bluntly.

"Yes, Miss Souren, and Uesugi Yui are currently using the bathroom, and I'm about to join them to assist."

Bon continued to wear her poker face as she told me this.

Souren Manranyama, Uesugi Yui, and now Bon were all in the bathroom. In other words, I was about to intrude into a bathroom where three girls in their youth were in... I couldn't even properly express myself.

Ah, I see. On the other side of this door is a heavenly paradise that leads to the realm of bliss. But this so-called "paradise" is just a literal meaning. Going in there definitely poses a risk to one's life. If you're lucky, you'll ascend to the Western Heaven, but if you're unlucky, you'll descend into hell - yes, it's all about kneeling down.

Heaven intends to bestow great responsibilities upon men, but first, it desires to test their will and dedication, exhaust their strength and endurance, starve their bodies, and deprive them of worldly possessions. However, this is definitely not the time for me to undergo such a trial and then take on great responsibilities. At times like this, I should quote the words of the ancient Greek historian Herodotus: "When God wants to destroy someone, He drives them mad."

Therefore, it's not possible to rashly and excitedly enter without considering the consequences.

Here, we shall discuss and explore the correct methods for entering the bathroom occupied by female students.