DEMON FIST DAYDREAMER

Minato Harukaze died in an accident just before entering university, and was reincarnated in a different world of swords and magic. He grows strong as he is raised by his Succubus mother in the depths of the forest where monsters live. Having the strongest demon "fist" technique instead of either sword or magic, he embarks on an aventure in this new world! A martial arts battle fantasy in another world that begins from reincarnation!! — Description from AniList community (anilist.co).