Mitsuri agrees to help her best friend’s reclusive adult son, a virgin who masturbates constantly, by giving him his first sexual experience. The veteran party girl expects an easy job, but every release only makes him instantly hard and even more ravenous. He grabs and sucks her G-cup breasts, pounds her tanned body until she climaxes repeatedly, then penetrates her again without a pause. His relentless follow-up thrusts leave her begging him to stop as he unleashes an outrageous 25 ejaculations.