After an accident turns a legendary 39-year-old hitman into a 13-year-old, he goes undercover at a middle school, juggling both classes and missions.

Rei Hitoma wants a quiet life, but instead he is put in charge of teaching a group of monster girls.

On the night of his favorite game's shutdown, Akira Oono awakens in the body of his online character: Demon Lord Hakuto Kunai.

A young man is transported into a video game world dominated by females.

After suffering defeat, Yuri Katsuki hangs up his ice skates for good. But will an encounter with two top skaters reignite his passion?

A young man, failing at life, is offered a new start as a 10 years younger high-school student.

Hachimitsu Academy, once an all-girls school, has become co-ed, and teen Kiyoshi is one of five boys to enroll. When he is caught peeping, Kiyoshi is sent to the schools prison, where his punishment is carried out.