Natsuko has been living for nearly ten years since the death of her husband. She resides with her stepson and father-in-law, and thanks to the life insurance left by her husband, she has no financial worries. Yet, deep down, she feels unfulfilled—her desires suppressed, with no intimate relationships since her husband passed. Little did she expect she would end up being taken by both her stepson and father-in-law. This story unfolds the shocking developments and rising emotions that follow.