Although her husband is kind and loving, Mizuki suffers from erectile dysfunction, and her ripe body is lonely. One day, during a massage with her husband, Mizuki accidentally gets turned on and sighs lewdly next to her husband, so she returns to the massage parlor alone. The massage therapist's technique makes her moan lewdly and she ends up having sex with him. Feeling guilty towards her husband, Mizuki becomes immersed in the pleasure she had forgotten.