I Sell Coffins in Japan

My name is Chen Changfa, a man who made a fortune by raising his coffin. I still remember when I was a kid, my grandparents always said something in my ears, they often raised coffins, and their hair often grew... Maybe it's because of my name. I've been a wealthy second generation since I was born, and my family's billions of assets are waiting for me to inherit. To be honest, life as a man destined to become a billionaire is really boring... But suddenly one day. My boring life has changed dramatically. The reason is that my uncle, who has been dead for many years, received a phone call from Japan...