Tsubaki Kato is 29 years old. She is a hard-working career woman living in a high-rise apartment in Tokyo. She is interested in a flyer in her mailbox for a "lesbian delivery health service." To relieve the fatigue and loneliness of her daily work, she calls a delivery health girl on the weekend... Unable to control her own lustful sexual desire, she devours the body of the new delivery health girl who knows nothing about her, makes her lick her wet pussy, and smiles in ecstasy. Once she is hooked on a woman, her sexual desire is unstoppable...