Mitsuki Nagisa, a young woman who finds herself used as an outlet for her stepfather's sexual desires. Despite making clear her discomfort through her facial expressions, his perverted nature won't be deterred; he forcefully shoves his tongue down her throat. As he relentlessly penetrates her tight pussy with his aging yet still formidable cock, she gradually transforms into a submissive slut, losing all resistance against this depraved act.

実の父親から性欲の捌け口にされちゃうみつきちゃん。露骨にイヤな顔をしても、屈折した性癖の父親は強引に口内に舌を捻じ込んでくる。加齢臭漂う気持ち悪い父に全力で抵抗しながらも膣奥に巨根を挿入されると次第にメスの顔になっていくのだった。