I'm the New Side Character (TDG) INSC (TDG)

Being reborn in the universe of tales of demons and God's Tian Mo finds good fortune. He doesn't want to have the responsibility of the main character, but still have a place in the story while having his way in this life.

If you haven't read Tales of Demons and God's I would suggest reading otherwise you won't understand anything that's happening. There is a novel, manhua/manga and an anime.