After losing her parents at a young age, Ayaka looked up to her relative Kayo as a mother figure. However, Ayaka's feelings for Kayo went beyond mere familial affection—she desired her as a woman. She constantly fantasized about Kayo's body, masturbating every night. One evening, driven by overwhelming desire, Ayaka confessed her lesbian feelings to Kayo. Though initially hesitant, Kayo was swept away by Ayaka's intense clitoral stimulation and gradually accepted her emotions. Soon, the two passionately pleasured each other's vaginas and anuses, indulging in forbidden incestuous ecstasy until they climaxed together.