友人の結婚式に参列するため、都内に出てきた香織。急遽、甥っ子が泊めてくれることになったが生憎とベッドは一つしかなく、一緒に寝ることになってしまう。香織は気の知れた仲だしと気楽に構えていたが、甥の視線はムチムチに熟れた肉体に釘付け。寝返りを打てば、身体が触れ合う距離に甥の理性がもつはずもなく…。

Kaori had come to Tokyo to attend a friend's wedding. Her nephew unexpectedly offered to let her stay the night, but unfortunately, there was only one bed, so they ended up sleeping together. Kaori was relaxed, thinking it would be easy since they were close friends, but her nephew's gaze was fixed on her voluptuous, mature body. With every movement of her body, their bodies touched, and there was no way he could maintain his composure…