[R +18] High School DxD

Issei Hyodo is a lecherous second-year high school student attending Kuoh Academy (駒王学園 Kuō Gakuen?), a former all-girls school that has recently turned co-ed. He lives a peaceful life until he is called for a date by a girl named Yuma Amano. At the conclusion of the date, Issei is brought to a local park, where Yuma asks him if he wants to know what her wish is. Under the impression of receiving a kiss from the girl, Issei is shocked when Yuma whispers the words "Can you die for me?" and transforms into a Fallen Angel. Issei is brutally attacked and killed by Yuma. Issei wakes up the next morning, believing the events that occurred were all just a dream. Immediately afterwards, he notices Rias Gremory, a buxom third-year student at Kuoh Academy, naked in his room. Rias reveals her identity as a Devil to Issei and claims that she has reincarnated him as a Devil who will serve as an underling to her and the Gremory Devil Family.