Kotoko is depressed because of Naoki's gloominess for having the news exposed to the entire school that they are living in the same home. But she gets a glimmer of hope because Naoki says to Kin-chan, who came to spy on the Irie family: "Today you hate someone, but tomorrow you love them." On the last day of Summer vacation, however, the house is vacant except for Naoki and Kotoko. Now that the two of them are all by themselves ...