Hiroshi, who visited his girlfriend's house, couldn't help but be captivated by the beauty and curves of her mother-in-law. That evening, thanks to her hospitality, Hiroshi ended up staying the night. While borrowing the bath, he found himself in an awkward situation when his mother-in-law washed his groin, causing him to become aroused. Unable to sleep in the middle of the night, he left his room and was confronted by the sight of his mother-in-law peacefully sleeping in her bedroom, her soft curves catching his eye. The young Hiroshi couldn't contain his excitement and reached out towards her sleeping form...!