Immortal Companion for Hire

Lei Feng is down on his luck and desperately needs cash. By chance, he discovers the secret transmigration portal of Yu Tongxi, a beautiful heiress living alone. She hires him with money, and together they transmigrate to a world where people can cultivate immortality. From then on, while you battle it out in the household, I'll tag along and have fun cultivating immortality, and together we'll reach the pinnacle of life...

Well, at least that's how things are supposed to go according to the usual formula. Unfortunately, someone always has to play by their own rules...