For reasons of her own, Rio enrolls in a massage academy for boys where students live in dorms. She'd planned to conceal the fact that she's a girl until the day she graduates... but it turns out she has to share her dorm room with two boys! She finds herself receiving a massage from one of them, naked! Tatsuki tells her, "I'll show you how good I am," and proceeds to touch her in a surprisingly delicate manner... as he touches her in a delicate spot, she can't help but moan. His touch just feels too good... and she can't keep quiet! Though he tells her, "You're my personal training partner," she starts to fall for him... then her other roommate starts to suspect that she's a girl...!