Otherworld Supermarket

Han Ji-oh, the owner of an all-purpose neighborhood store, discovers a dimensional portal opened by a kitchen knife.
Through it, he begins traveling back and forth between the real world and another world.
Using a subspace, he starts doing business in both worlds, selling goods and making money.
His modest dream was simply to earn enough to become a building owner and live comfortably.
But then he gets dragged into a hero’s party and is told to stop the Demon King from being resurrected?! Thus begins Han Ji-oh’s dimension-hopping commercial action fantasy, as the owner of the Otherworldly General Store!