It almost repeats itself every day, wake up, go to school, do homework, and relax on holidays. But...why are there still matryoshka dolls?
I woke up bleary-eyed and realized that I slept relatively late this time, and the events in my dream were still vivid in my mind...?!

"Why...the room layout has become cleaner?"

Go to school with doubts.

Everything on the road is similar to what I remember, but different. Clean, tidy, and unique in style, nothing strange at all, but with a hint of uneasiness.

"When... did it feel like the whole world changed?"

"Have I traveled through time?"

"Still going to school?"

"Students, there will be a new teacher coming to class this semester. This applies to all subjects. Remember to be obedient." The principal came to the class to speak.

(Really? Why did the entire batch suddenly change?! )

If you don’t understand something, remember to look it up~

This time travel is like a matryoshka doll,

Because after traveling through time, traveling through time again.

How about it? AU is amazing, right?

And I will be abused again because I offended Error before.

As we all know, the evil bone group cannot be messed with.

After entering the AU, I was playing crookedly again and met various evil bones.

well...