Hiroshi, a young man striving to become an electrician, continued pursuing his dream while building his stamina through daily physical labor. One day, he visited his girlfriend's home—where they had been dating for two years—to perform a simple electrical job. Her mother welcomed him with a warm, gentle smile. From her demeanor, Hiroshi could sense her deep affection for her daughter, and he genuinely felt grateful toward her. As the work progressed, the mother climbed awkwardly onto a ladder, wiping and cleaning as she went. Hiroshi instinctively supported her from below, looking up to see the beautiful sight of her buttocks tightly framed by her modest underwear peeking beneath her skirt. That night, at the kind invitation of his girlfriend's mother, Hiroshi stayed over—unaware that he was about to embark on a thrilling new experience.