--Yuri will lose...♪ Yuri is the volleyball team's ace with outstanding athletic ability, and Tsukika is as cute as a small animal. The two are childhood friends and lovers in a secret relationship. They've always been close, but recently Yuri has been acting strange. She's been spacing out more often, and it feels like she's avoiding him even when he calls out to her. Suspicious, Tsukika sneaks after Yuri after school and finds her in a deserted gym storage room... He peers in to see what she's doing, and there she sees Yuri exposing herself to the coach...