Duong surprised her boyfriend by cheating on him with her best friend. Upon arriving in her room, she meets two guys. And thus she discovers with surprise that her sister is renting out her room in her absence. Nam, who cannot accept his homosexuality, is currently in Duong's room. But the date of his contract is coming to an end. Meanwhile, Huy, a guy whom everyone benefits from, has to pay to return to the room after Nam leaves. While the three guys cannot decide who should stay and who should go, they decide to share the room by signing a contract.