就職活動の面接をきっかけに、田舎でひっそりと一人暮らしをする叔母・小雪の家へ泊まることになった大学生の京。小雪は、京にとって幼い頃からの憧れであり、忘れられない初恋の女性だった。クーラーの効かない蒸し暑い六畳一間…着替え中の小雪を覗いてしまい、彼女の豊満なデカ乳と自分のウブな勃起を意識し合ったその瞬間から、二人の間の理性の鎖は音を立てて崩れ去る。その夜、パートから酔って帰宅した小雪は、数年間の孤独と性欲を爆発させ、京を亡き夫と重ね合わせるように激しく求めて…。

After a job interview, university student Kyo ends up staying at the home of his aunt Koyuki, who lives quietly alone in the countryside. Koyuki has been Kyo's hood crush and the woman of his unforgettable first love. In the hot and humid six-tatami-mat room without air conditioning, he peeks at Koyuki while she's changing, and the moment he becomes aware of her voluptuous breasts and his own innocent erection, the chains of reason between them crumble. That night, Koyuki returns home drunk from her part-time job, and, unleashing years of loneliness and pent-up sexual desire, passionately desires Kyo, as if he were her deceased husband…