第 1 集: Koyori 和朋友們前往一家新溫泉，而 Takeshi 和 Mayuko 則分別參加。

1

Chronologically, this episode occurs between episodes four and five of the television broadcast. Koyori wins tickets to a family-oriented spa and water park that just recently opened; Yorito, Koyori, Mana and her friends go together, though Aono has to stay in the hospital. Coincidentally, Takeshi also wins tickets to the spa, and takes Mayuko with him. At the park, Takeshi and Yorito meet, and Takeshi initially chases Yorito since he thinks Matsuri is at the park too, but she also could not go because of her condition of a Yaka. After realizing Matsuri is not at the park, Takeshi calms down, and Yorito meets Mayuko; the rest of Yorito's friends also meet them. After the sun goes down, Matsuri comes to the park, but thankfully Takeshi and Mayuko have already left. (The OVA glosses past that Mayuko is also a yaka, and even shows all the girls in a mineral pool, with a window behind them with sunset colors.) (Source: Wikipedia)