Introduction:
Na na na, she just took a nap in class, how come the world has changed?
A group of strangers appeared in the classroom - the boy next to him called himself Fuji Shusuke, the star transfer student everyone knew in the class was Kurata Sanan, and there were a group of beautiful girls living in the dormitory, one of whom was named Zhou Zhiruo...
The heroine stroked her forehead: Maybe they were there a long time ago, but I just didn't remember?
(…You really don't remember anything in your mind.)