"I want to have sex with you, aunty!" When the young man declared this with a serious gaze, Kasumi trembled with confusion. She had noticed that her son's friend, Takahashi, was looking at her lustfully, but never imagined she would actually become his target. Swept up by his pure affection and intense emotions, Kasumi gradually begins to transcend her role as a friend's mother, awakening to feelings simply as a woman.