Popular H-cup actress Mina Kitano goes undercover to a downtown brothel! Under the rule that "you must only play according to the rules of the store, but you cannot refuse to do anything requested by a customer," Mina is full of motivation, but she goes wild in three stores, a men's beauty salon, a delivery health service, and an M-sensation store, with no rules! At the end, she goes to a happening bar and gets the regulars involved in a wild party. What will happen?!