The story revolves around Issei Hyoudou, a high school student who is killed by a girl on their first date. He is revived as a demon by Rias Gremory, a beautiful and powerful demon, who recruits him into his clan and turns him into his servant. Issei agora vive em um mundo cheio de seres sobrenaturais, incluindo anjos, demons and various other mystical creatures. He finds himself involved in battles between factions of demons and angels, as he tries to adapt to his new life as a demon and deal with his own romantic feelings for Rias and other girls. The series combines elements of comedy, Action, ecchi e romance, com muitas cenas de luta emocionantes e momentos de fanservice. Throughout history, Issei and his friends face various challenges and powerful enemies, while developing their own powers and strengthening their bonds with each other.

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