"Kouryakuhon" o Kushi Suru Saikyou no Mahoutsukai ~<Meirei Sasero> to wa Iwasenai Oreryuu Maou Tobatsu Saizen Route~ - Vol. 1 Ch. 1

[RMXStudio]

oh, great another one of those Mary Sue stories where the MC gets some sort of power that makes him cool and make all those bullies jealous and make all girls fall in love with him. Seriously, just remove the "cheat sheet" book from the story and make MC the one to figure everything up himself and maybe even create a book with knowledge he acquire. But no, we'd rather have a self insert character having it easy.

Eh, some stories are like that. Not too much to think about, just power fantasy. It's not the best sort of story, but I do read them for something mindless.