Details

After losing her husband in an accident, she lived with her son. One day four years ago, she had a one-night stand with her son. The forbidden door that was opened only once... that memory stuck in Sachika's mind. One day, before her son starts work, the two of them go on a trip to a hot spring to reminisce. Perhaps she is secretly attracted to her late husband because her son reminds her of him... When their skin touches, she hears the sound of something starting between them. This is a forbidden incest story of two couples who desire each other and have sex over and over again.