Ver en Cuevana. Hee-jung, a college student, uses up a lot of money on Bitcoin and so she can't pay back her friend, Joo-yeong. Worried, she came to work at a room salon and pays off the money she borrowed. Seeing how Hee-jung is, Joo-yeong tells her she wants to work at the room salon, too. Eventually, they both became aces! Until the vacation ends, they are slowly getting money, their hot services are attracting more and more customers...