Descriptions:
Kamejiro, who lives with his girlfriend Kokoro, finds out that she has been invited to a reunion of their school days. The next day, Kokoro came home in the morning, but did not say anything. Kamejiro becomes even more worried, but then he witnesses her bringing a man (her ex-boyfriend) she met again at the reunion into her house, and sees the whole scene of her affair, causing him to get depressed.
