Blue Archive: The Physicist of the Prefect Team

Chen Ai, an ordinary person who plays Kamen Rider video games at home, inexplicably finds himself in a place called Giwatos and turns into a newborn child.

Chen Ai: I've been reborn. In my previous life, I didn't study hard and, under the oppression of capital, became a useless person who only knew how to play video games. In this second life, I must…zzzzzz

Elementary school: The birth of a genius; Middle school: The fall of a genius; High school: The arrival of cheat codes.

After inheriting Kiryu Sento's abilities, he naturally (through connections) joined Gohena's Disciplinary Committee, becoming one of the few male students at Giwatos.

Chen Ai: What? Not just a few? I'm the only male student here?!