The narrator wakes up in the middle of the night to find that he's been locked out of his room. He's worried that something bad is going to happen to his brother, who's on a business trip with his friends. He wonders if his brother's former boyfriend, Yohei morifuji, is still hanging out with him. He also wonders if he has a mutual crush on the narrator's broth er, who is also on the business trip. The narrator is worried that sex isn't as good as it used to be, and he wonders how his brother managed to get his crush on an app. He asks if he could see his brother on the app, but he can't because there are so many people using the same app that he could never see him on.