For five long years, a secret, passionate relationship has continued between a mature housewife and her son’s close friend. What began as a momentary lapse in judgment has evolved into a deep, ongoing friends-with-benefits arrangement filled with intense desire, risk, and forbidden pleasure. Despite the constant fear of discovery by her family, the woman cannot resist the overwhelming physical and emotional connection with the much younger man.

It was the winter of five years ago that I was guilty of unfaithfulness. At that time, Yuzuru-kun, whose husband's affair was discovered, shook his body and honestly conveyed his favor to me, who was injured. I wanted to fill my loneliness, but even though I knew it wasn't good, I responded to that thought. A young boy aged away ... Every time he was asked, his flickering guilt was drowned out by intense sex. At first, I intended to hit my husband and play with fire, but my feelings for him grew day by day.
"Am I not good enough? Yuna's lover..." Five years ago, on that day, my relationship with Hajime changed dramatically. After discovering my husband's infidelity, Hajime comforted me with a clumsy kiss. That night, I decided to grant Hajime's wish. Partly as a way to spite my husband, but it was also a moment when I cherished the innocent Hajime. From then on, we continued to yearn for each other, and after five years, our relationship began to change...