Kamejiro, who lives with her, finds out that she has been invited to a class reunion from her school days. Kamejiro, who has just turned 20 and is not used to drinking yet, is worried about letting him go to the bar. Even if you close in on him, you won't say anything. Kamejiro becomes even more worried, but when he witnesses the man (ex-boyfriend) whom he met again at the class reunion being brought to his home, he sees the entirety of the cheating scene and gets depressed.
