Reincarnated as the son of Demon Lord

Rin has living a life full of regrets. However, following a tragic accident, He is reincarnated in the cultivation world as Deus and met with a Fortune's chosen who is tasked with saving the world from the demon lord but the demon lord he's going agaist is his father? I'm the son of demon lord? Fortunately, Deus's prestige and power are superior to everyone else’s, so shouldn’t it be easy to trample on a mere fortune’s chosen?