Kazushi and the Shirakawa sisters decide to go to the pool on the substitute day off for the sports festival. Ayane, who has been tasked with preparing the lunch boxes, finds herself standing in Kazushi's kitchen wearing only a nude apron for some reason. "I heard from a friend that this is the best way to seduce a guy..." As she blushes and shakes her buttocks while they're alone in their apartment, Kazushi can't help but feel a sense of relief. He slowly approaches her from behind...