Leaving her 6-month-old nursing infant in her mother's care, Ayaka, a married woman suffering from a sexless marriage, travels two hours by first morning train. Harboring a secret lesbian desire she can't confess to anyone, she spends her days lost in masturbatory fantasies. Though she appears innocent and naive at first glance, she actually has large breasts with prominent dark areolas. Her body's ability to forcefully spray breast milk transcends her role as a wife, revealing her intense feminine allure. What she truly craves is a purely female connection, beyond the roles of mother or wife. To satisfy this deep longing, she is selfishly yet thoroughly played with and dominated.