Shota-kun has a crush on Azusa, the big-breasted caregiver who looks after his grandfather. Mischievous as ever, he decides to play a prank by placing the electric massager meant for his grandfather against Azusa's crotch. At first, she makes a slightly pained expression, but quickly reveals that it feels incredibly good. Later, imitating the massager, Shota-kun presses his dick against her groin and accidentally slips it into one of her holes, discovering just how pleasurable it feels. Once again, Shota-kun indulges in his delightfully naughty prank.