Hiroshi, who had been dating his girlfriend for a year, visited her place and couldn't help but be captivated by her mother's beauty and voluptuous figure. That night, after being allowed to stay at his girlfriend's house, Hiroshi found himself getting an erection when her mother washed his crotch while he was taking a bath, the atmosphere becoming unbearably teasing. Later, unable to sleep in the middle of the night, he left his room and saw his girlfriend's mother's soft, inviting curves as she slept soundly in the bedroom. The young Hiroshi couldn't contain his excitement and reached out to her sleeping form...