Like there is this school that accepts Exorcists of some kind, humans, and Phantoms which Exorcists exorcise. What for? Why are they in the same school? It wasn't even mentioned. Otome game? What's the otome game about? Also not mentioned.
The world renowned strongest swordsman managed to beat the Dragon God in exchange for his life. In exchange for beating him, the dragon sees him worthy of a wish.
He has no parents, friends, lovers. Anyone related basically.
In his new life, he has a family. He got shunned (subtly) after his family found he has no (more) potential for growth. He shrugs it off like nothing happened cuz he was "interested" in magic.