Misunderstanding

You Qi receives a gift from his admirer, but mistook that the gift was from Luo Yin. Han Qi accidentally washes one of the remaining 2 pairs of Luo Yin's underwear, but when he receives a box of new briefs and a box of medication, he suspects someone from his class is shadowing him. When Gu Hai tells Luo Yin that he was the one who gave the gifts and that he was the one who tore out Yin's homework (apologizing for that as well), Luo Yin stomps out in anger. Later, Gu Hai changes his seat to be behind Luo Yin, and he starts to plan revenge by cutting some holes out of the school jacket that Luo Yin wears. During the class physical lesson, Gu Hai impresses both his classmates and his teacher by producing 106 push ups in a minute.