First, he is in a fake relationship with ryuuga, he cant even tell to the others bc ryuuga is suposed to be a man. Even so, he has more chemistry anf love stuff with Mion above anyone else, next to the swordmaster gurl, so there isnt even a main couple formed so there isnt NTR, even when he went simp mode to this emo guy, ryuuga was a man and tje emo guy tried to expose her that she is a woman, so mc cant say you cant met ryuuga bc he is suposed to be a boy. Mc sleeps witj a naked snake girl, even has a son with Elmira, three of evil spirits are his friend, yukimira somehow thinks of him (maybeee, a lot.of hints) as a marriage partner. At some point you understand that any girl is a good choice for him, and even the evil spirit that likes ryuiga has zero chance but if they even becone something then mc can date anyone else. Anyway guys, there is not ntr here. Dont believe this cuck