In this chapter, Eunsang tells the reader that something "completely unexpected happened" today. He explains that his house is "a little messy" since he lives alone, and that he's been getting messages on KakaoTalk from woojoo, who broke his arm in a skateboarding accident. He also says that he can't organize the data he needs to present to his classmates because he'll have to go back and forth between his house and his school. He tells us that he wants to be with Yeoreum, even though his mom has told him not to. He says that if he had brought his laptop with him, he would have been able to work at school instead of going to his house. He then tells us about his relationship with his twin brother, Hyung, who lives with their parents in the countryside and lives with them in the city. When he got accepted to college, his parents moved to the city to live with him. When they got to know each other, they couldn't even call each other "brothers" because they didn't know how each other lived. The passcode to his brother's house is related to his birthday, and the passcode to Hyung's home is also related. The two of them have a secret relationship that they don't yet know about, and they're both jealous of each other's lack of knowledge.