Yumi has been married to a man with a child for three months. She has a good relationship with her husband, but her relationship with her son, Kazuki, is not good. So when I went on a hot spring trip at my husband's suggestion, the distance between the two of them grew further. However, Kazuki, who felt that Yumi was a woman, could not control his desire and fell asleep. Yumi fainted in pain after being repeatedly penetrated by his fierce and passionate piston. Her body could no longer resist his cock before the wonderful intercourse that her husband could never taste.