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?!

"I'm just an ordinary person, why are you giving me this kind of power?"

"I just want to live a good life. I finally have a family, and you're telling me that if I don't work hard, this universe will disappear?"

"I'm a genius?! Then tell me what this 'ordinary person' is all about?"

"Remember this: I'm just an ordinary person passing by."