Yukari is raising her son on her own and has found a job. One day four years ago, she had a relationship with her son with the promise that she would only do it once... Ever since that day, her heart and body have been aching. One day, out of gratitude, her son invited her to go on a trip to a hot spring, and she decided to go alone... Her mother can't forget that day. Even though I know it's no good, I can't stop. A new forbidden relationship begins between her mother and her son...an incest story!
