Pet Shops Are Full of Mythical Beasts: You Can't Afford This Dog

In the eyes of ordinary people, this is just a run-down pet shop that is about to close down; in the eyes of the protagonist, this is a room full of mythical beasts from the Mountains and Seas. The protagonist subdues the mythical beast through daily activities such as feeding, barbecuing, and grooming, and backhandedly presses the arrogant and domineering billionaire chaebol to the ground and rubs it.