S1, E3: While jogging, Xia Rui finds tutoring notes and mistakenly thinks Zhao Yishu helped her. Nan Xi quietly encourages her to study for exams. Their relationship deepens, but Nan Xi faces misunderstandings from classmates. He helps Xia Rui in class, but when she asks about friendship, he only wants to give her the wooden box. An accidental breakage reveals secrets, leaving Xia Rui in tears.