Upon seeing the score result for an exam, Selenia and Tomomi remark their days since their first year meeting at Hakureiryō Academy, where they eventually become rivals to see who's the most diligent and growing lady. Meanwhile, the academy's water system goes out-of-order, and have to use a indoor natural hot spring for the time being, where the servants and uppers are getting into perversions.
Elenco: Mai Nakahara , Ami Koshimizu , Ayako Kawasumi , Rie Kugimiya , Saori Hayami , Kana Hanazawa , Haruka Tomatsu , Ayumi Fujimura , Mariya Ise , Shinji Kawada , Mai Goto , Rina Hidaka , Yuko Goto , Kumi Sakuma , Kazuyuki Okitsu , Takafumi Kawakami , Akeno Watanabe , Saori Gotou , Taketora .