DxD Vengeance

Mikado Hyouduo heiress to the great devil clan Hyouduo did the unthinkable, she fell in love with an angel. Despite their best efforts to keep our relationship a secret, they were found out. she was enslaved to the house of Gremory as punishment for her. Years later a boy named Issei appears claiming to the heir the once great Hyouduo clan. He has one goal, revenge!
OC Issei, Different harem Issei, Godlike issei