She is the sassy Taekwondo goddess, and he is the cold-faced CEO who is turning everything upside down in the business world. An unexpected encounter in a bar sparked a night of entanglement. They thought it was time to say goodbye, but a contract put the two on the fast track to marriage. Living in the same room, temptations and ambiguities abound. The door slowly opened, but his green tea green plum intervened forcefully with the past, and the gentle senior she had a crush on also appeared again. In this game of love and contract, who is sincere first, and who is guarding in secret? Let's see how they overcome all difficulties and turn a transaction that started out of impulse into a deep love that will last a lifetime.