Since losing her husband, Emi has been raising her son Mitsuo on her own. But now that Mitsuo is finally becoming an adult, Emi is happy but also a little anxious. While she has been doing her best as a mother, she has forgotten that she is a woman for the past few years... Since realizing this, Emi has suddenly felt a deep desire for her body and has begun to satisfy herself almost every day. However, seeing Mitsuo masturbating in a dimly lit room, Emi's motherly love drives Mitsuo to do something unexpected.