Single mother Nozomi Hazuki has been raising her only son while working as a building cleaner. Despite their poor lifestyle, they found small happiness together, sharing laughter every day. However, her life changes drastically due to an incident caused by her son. In front of her son's eyes, she is brutally assaulted by a delinquent family using cruel laser-like methods, forced to watch as her son ejaculates. She uses the back of her throat to clean her son's dried semen. Nozomi enjoys mutual masturbation with her beloved son. Bound and helpless, she endures extreme pleasure torture, and is then forcibly made to commit incest with her son against her will.