Nube, Kyoko, her friends, and even Yukime the Yuki-onna are at the beach for a day of fun. Despite melting in the scorching heat, Yukime takes every chance she gets to declare her burning love for Nube. However, Kyoko, still suspicious of Yukime, continually pours cold water on her attempts to get close to Nube. As sparks fly between the girls, a dark and sinister shadow appears in the sea.