Miki lost her husband in an accident and has been raising her son on her own. The son, who was wholeheartedly loved by the woman older than him, eventually developed feelings for the mother who raised him that transcended those between parent and child. One day, his son had to move away from his parents when he got a job. His last memory was to go on a trip to a hot spring with his parents. My son loves his mother... He forcibly takes her lips and cums. Miki was surprised and resisted, but she gradually succumbed to the pleasure that flooded her and began to invite her son's pleasure into her...