At 32, Yurika is devastated after discovering that her nearly five-year relationship was, in fact, an affair. Forced to transfer, her new coworker drags her to a welcome party where she catches the eye of a college student sitting across them. Feeling distraught, the calm and cool, Aoi, whisks her away. Despite being ten years younger than her, she gives in to a night of passion with him. Several months later, who walks in but the very man she thought she'd never meet again, Aoi. Will their relationship blossom or will it remain purely friends with benefits? ４年半も既婚男性に騙されていたなんて…私、もう終わってる――。 不倫が原因で本社に異動になった忍野百合花(32歳)。歓迎会の夜、隣で合コンをしていた大学生の久我蒼生に、ひょんなことからお持ち帰りされてしまう。 10歳も年下からの誘いに動揺する百合花だったが、二度と会わない相手だし…と一夜を共にする。 ところが数か月後、新入社員としてやってきた蒼生とまさかの再会。 「あの夜のことは全部忘れて」懇願する百合花に蒼生は――！？