A slender amateur sister striving for a model-like physique through daily workouts. Often told she has squirrel-like eyes, she's a petite, small-animal type girl. While talking, her short skirt keeps riding up, giving brief glimpses with every movement of her legs. Even when she tries to cover herself, your eyes are inevitably drawn to the sight—creating a strange sensation of seeing something you shouldn't. Despite conversation, your gaze naturally drifts toward her. Growing slightly uneasy, she mentions she does yoga, so I ask her to show me some poses. The pigeon pose especially exposes her panties completely, leaving her fully on display. She remains completely unaware, making me the one who feels embarrassed instead. Taking the opportunity, I ask to touch her while she holds the pose. Gently placing my hand without disrupting her balance, I find her nipples already hardened. Despite the meditative nature of yoga, she's unable to focus—her body is highly sensitive and quick to arousal. Describing herself as a bit of a masochist, I wonder if being slightly forceful is okay, so I push her down—and with just that, she lets out a soft moan: "Ah... nn..." Her extreme sensitivity and rapid wetness are beyond words. Just how filthy she can be—you'll understand once you see it.