High School DxD Vol. 1

A war between angels, devils, and fallen angels rages on Earth, but for Issei Hyodo, a pervy, hormone-addled second-year student at Kuoh Academy, a former all-girls school that recently turned co-ed, things are as peaceful as ever. That is until he is asked out on a date suddenly by Yuma Amano. But what should have been a blessing for this horny high schooler turns out to be anything but when she reveals herself to be a fallen angel named Raynare and kills him! He awakes the next morning, thinking it was all just a dream, but for some reason there is a naked girl in his room! Her name is Rias Gremory, and not only is she an absolute buxom knockout but she’s also a high-ranking devil who used her powers to bring him back to life. But there’s a catch: not only is Issei now a devil himself, he’s also her servant!
Notice: This book is written in Japanese.