High School DxD Hero
The story takes us into the daily life of Issei Hyodo, a somewhat lost high school student who is killed by a young girl. However, Issei reincarnates into a demon, and from that day on, he becomes Rias's servant, a mighty demon who is also the prettiest girl in high school. Demons are subject to a hierarchy and rules, so Issei will have to work hard to climb the social ladder and get the right to have his own servants. He soon met the enticing Asia Argento, with whom he formed an unusual duo.