The scene opens with a conversation between a boy and a girl. The boy tells the girl that he has seen her sister, Lijia, who is from class 5. The girl tells the boy that she has seen his brother, chenghuan, earlier in the day. Lijia tells him that her brother wanted to introduce him to someone earlier, but the boy refused, saying that he was too drunk to be introduced to someone. He is shocked to learn that the girl is his sister, and that she is the one who has been taking care of him the whole time. He notices that she seems to have some "switches" in her, and he wonders if she is like his sister.