I'm Working as a Ghost in the Human World

"My name is Yan Kai, and I am an intern in the underworld. I never expected that the underworld bosses would fight among themselves and blow up the underworld! I narrowly escaped and ended up in the body of a young man who had just died, I found out after I woke up, He is actually a super rich second generation, The family had already chosen a charming fiancée for him; Status, money, beauty, everything will become mine..."