Is there an anime with an OP male MC that has like a demon inside or an 'evil' side and can do a minor transformation, kind of like Naruto and the nine
Black Clover - Episode 62 discussion : r/anime
Black Clover (season 2) - Wikipedia
Asta awakens Demon Form - Black clover episode 62 - YouTube
ASTA DEMON FORM! Black Clover LIVE REACTION! (Episode 62 - 63) - YouTube