When Lin learns that Si nan is sick, he goes to check on him. He tells her that he has a lump of "protein" in his ear, and that sometimes he feels closer to her than she does. He asks if she cares about him, and she tells him that sometimes it is "determinable" and sometimes "uncertain". She asks if he feels better now, and he says that he does. She asks him to test it out, and when he does not, she asks him why he is calling her by her full name. He says that she is calling him by his "full name" and that she should hurry and let him go. She scolds him for touching her face, saying that she will not be pushed away. She tells him to come in and introduce him to a new student.