Seyan, Kim Dohee's friend from middle school, is hanging out with Kim's classmate, Jung Eun-ju, who is also a student at the same school. Seyan asks Kim if he can concentrate on her when they are hanging out, and Kim replies that he can't, because he's too busy with the other students. The two of them are interrupted by the sound of someone's voice, and Seyan notices that someone has pasted a message on the wall. She asks the person who pasted the message, and the person responds that it's obvious that Kim likes her friend, Seo Hyun-joo. She says that she heard Kim and Seo Hyun hanging out together when they were in first grade, and she knows that Kim is like her friend at this time of the day. She wonders why they're talking nonsense when they don't really know anything, and says that everyone gets lost when they hang out like this. She points out that the message is from an app called "katalk" , which is a messaging app used in Korea. The sound of the message makes Seyan think that Kim has been hooking up with Seo Hyun, and that she's trying to get the boys at the school so that she can have sex with him. He asks if they've seen the photo of Kim and her shield, and they both agree that it must have been Seo Hyun's, too. They wonder why Kim has to touch Kim, and he says that it is the price of betraying a friend.