A Smooth Life of Rebirth

Rebirth story, the past life was sad and dark, because of the good deeds done in that life tens of thousands of years ago, I got the chance to be reborn. He came back from rebirth with nothing, but by chance he got a space and a spiritual pet. Although I am cultivating immortality, I don't want to live forever. I just think it is enough. I just want to be warm for a lifetime, not for eternity. The male protagonist is polite and dotes on the female protagonist, eliminating the last trace of darkness in the female protagonist's heart.