The cashier tells Mingchen and Annan that he can't eat instant noodles anymore because he has to work as a cashier. Mingchen asks him to go and buy some food for him, but the cashier tells him that it's his duty to do so. He then tells the two students that they can buy milk for themselves at school for 10 yuan, which proves that they're friends. The two students decide that Mingchen should go and help Annan take care of Annan's sister, who has a cold. The students then decide to go ice cream together, and Mingchen tells the cashier that he should treat the two of them to ice cream as well.