In an accident at the summer festival, Yu lost her memories of high school, including her entire relationship with Kurosaki-kun. When Kurosaki-kune worriedly joins the amnesiac her on her summer visit with her parents anyway, Yu finds herself more and more curious…and her attempts to talk to him somehow culminate in a risqué encounter! Not one to be outdone, Shirakawa-kun whisks Yu away behind Kurosaki-kun’s back. The two princes’ showdown over Yu hurtles toward its finale. Will their friendship survive?