Risa's husband, Hirotaka, returns to his hometown for a high school reunion after 20 years, bringing his wife along. The family home, once a pawnshop, exudes a heavy, nostalgic atmosphere, making them feel like they're on vacation. To enjoy their time together, the couple decides to relax inside the old storehouse. By chance, Risa's father-in-law, Hiromi, walks in and secretly watches them affectionately cuddling. Reminded of his late wife's image, he becomes captivated by Risa's body and, as if regressed to his youth, forcefully latches onto her breasts. The atmosphere instantly heats up, and their relationship begins to shift into something entirely new.