Their reunion after more than a decade came when a man arrived as a sales representative for repair work. He was Shihori Toi's former rugby club senior, whom she had managed during college—and her first love, Shimoeda. After graduation, they gradually lost contact, and Shimoeda eventually married early, fading completely from Toi's life. But now, meeting again after so many years, the distance between them begins to close once more. Meanwhile, her husband remains constantly absent due to work, widening the emotional gap between them. Torn by conflicting emotions, Toi finds herself caught in a whirlwind of desire and guilt. As new feelings start to bloom, they collide with memories of their past romance, spiraling into a tangled web of infidelity, temptation, and betrayal.