A sadomasochism that started when we first met, a tragedy that my biological father has grown old. One is a girl who comes from a scholarly background but suffers repeated domestic violence. She looks bright and cheerful, confident and calm. He is cruel and stubborn on the inside, and is nothing short of a little devil. One is a gentle, elegant, intellectual and high-quality big brother next door. He is an unparalleled and beautiful son. In the entanglement with the devil, what kind of sad ending will there be?