On the first day of her summer vacation, Miyamae Kanako's younger sister Miki pays her a visit. Then, as Kanako fawns over her, Miki opens her mouth and declares a shocking truth... Afterward, Ishima Ryuken's husband-to-be also visits the school! And he's an elementary schooler, to boot!! It's summer vacation in the 7th volume of this yuri girl X super-sadistic cross-dressing boy high-tension school love comedy!