From an ordinary girl to the heir of the Chu family, the head of the five major families, his feelings are constantly changing. He, like the big brother next door, protects her, but when she is tempted, he is engaged to someone else. He is calm and steady, guarding her when she needs it most, but leaves when she falls in love with him. He, gentle and cunning, is by her side. When he returns and faces the three of them, where should she go?