Issei Hyoudou is a second-year student at Kuo Academy who has a very perverted and lewd demeanor. He leads a quiet life until he is called on a date with a girl named Yuma Amano. When he begins to get dark, the girl takes him to a secluded place where she shows him his true form. She is a fallem angel and plans to assessinate him. Since on one can save him, Issei dies. When he wakes up, he discovers that he has been reincarnated into a devil, and from that very day he works as a servant of Rias Gremory, a high-level devil girl who happens to be the most beautiful and popular in the school.
