Shota-kun sets his sights on his older brother's wife and comes to stay at their home, taking advantage of his position as a child to grope her breasts and tamper with her sanitary products, revealing his bratty, precocious side. One day, he accidentally stumbles upon his sister-in-law masturbating—unaware that his older brother is impotent and that she's been sexually frustrated. This unexpected encounter sets off a surprising chain of events. The inevitable prank unfolds on the spot, deepening the storyline. During a mixed bathing scene, he continues escalating their intimacy by touching her breasts, leading to a blowjob experience, with erotic moments piling up. At night in the bedroom●, the mischievous charm of the married woman overwhelms Shota-kun completely, leaving him utterly smitten. His helpless infatuation is exactly what makes this work so captivating.