the demon of union (massive crossover harem x OP male oc)

Toad was a student of union academy. But he was often bullied by some of the other students. Of course he had many friends he can always count on and they are teams RWBY, JNPR, CVFY, Rias and her peerage, even the headmasters and professor Goodwitch. Blake, his crush has always supported him. Yang often trains with him which makes him stronger. then one day, he discovered his power. He realizes that he's a demon but his friends and crush accepted him anyway. The girls fell for him immediately. Putting even Issei to shame.