A cute girl suddenly moves into a male dormitory at a certain vocational school. Despite being told "this place is off-limits to girls," she shockingly reveals herself to be a transgender woman. When the guys throw a drinking party and decide to verify her true nature, they are momentarily stunned upon seeing her cock—but soon become entranced, fighting each other to claim her anal. Throughout it all, a mysterious smile lingers on her lips, leaving everyone wondering what hidden truth lies beneath.