The story follows Issei Hyōdō, a dim-witted, lecherous second-year high school student who is killed by a girl on his first date ever. Issei is reincarnated as a devil, and from that day forward, he serves as an underling of Riasu, a high-level devil who is also the prettiest girl on Issei's campus.
Guri is an angel with a mysterious item that turns any two people who kiss into a couple. She appears before a high school boy named Seiji Aino. However, there is a yandere high school girl named Akane who loves Seiji.