Unsere neun Protagonisten gönnen sich nach dem anstrengenden Organisieren des Kulturfestes ein paar Tage Auszeit. Sie fahren mit dem Zug in ein Ferienhaus direkt am See und Iori nimmt dies wieder einmal zum Anlass, Kouhei und Erika zusammenzubringen. Das dabei wieder so einiges passiert versteht sich von selbst...
Kohei shows an expression just like at the beginning of episode 1 but is interrupted by his friend. Everyone has vacation as they arrive at cabin they were all surprised because it was huge and everyone will be sleeping together. Yukimaru talks to each other about promise they have made which creates a misunderstanding to Seichiro. After the bath, Kanade asks everyone what is the guy they think of the most and surprisingly answer is Kohei (even Kuze) except for Shiro (she thinks about her brother). Later, they have a tea party together.
In the morning, they have the main event "The Great Tennis Match-ups!" and Erika and Kohei win the match. After the match, they have a bath at hot-spring then Iori tricks Kohei again (makes him go to girl's bath). Erika thanks Kohei but then sucks his blood from his finger (he cuts himself while opening a bottle of energy drink).
2011年2月26日発売の角川コミックスエース発行コミック版第6巻DVD限定版に収録のオリジナルエピソード。文化祭終了後に、メンバー全員が旅行に行く。
