"you're my only one" (dxd harem x male oc)

This story takes place during season 1 episode 5.

Rias and her peerage was betrayed by Issei so Rias removed him from her peerage and removed his sacred gear. The next day, a new student came to kuoh academy. His name is Toad Skywalker, he's a fallen angel. When he met Rias, Toad and Rias fell in love immediately and she added him to her peerage as her new pawn. Many of the girls has also fallen for him.