Okumura has long been concerned about his friend Kota's mother, Yuna. - One day, Okumura ends up staying at Kota's house, puts Yuna to sleep with medicine, strips her naked, and films her with his cell phone. - Later, Okumura sneaks into Yuna's room and is caught rummaging through her underwear. He shows her an obscene photo and threatens her, and then proceeds to devour the body of his friend's mother, whom he admired. - Then, Yuna's bra was taken away and her beautiful breasts swaying without a bra were played with like every day...