I Just Travel Between Worlds, Why Does Everyone Call Me Dad?

One system notification changes everything. Burnt-out office worker Tong Yuan'an accidentally binds a world-crossing system and gets thrown into the savage Primordial Era—72 hours to survive among ancient beasts and cosmic dangers. But where others see death, he sees opportunity. Armed with modern knowledge and a merchant's cunning, Tong Yuan'an begins trading worthless industrial scraps for priceless divine treasures across countless realms. As he grows wealthy beyond imagination, something unexpected happens: the powerful beings he encounters start calling him 'Dad.' What begins as simple in…