歯医者さんで働くのを夢見る、実家ぐらしの女子大生・こはるちゃん（21）。でも服を脱いだら、150cmのちっちゃな体に100cm超えのバカでかいJカップがぶるんっ！ デカすぎるおっぱいのせいでまいにちムラムラして、自分の部屋で週8回もオナニーしちゃうどエロい女の子。そんな彼女をAV男優がストッキングで縛り上げたら…隠していたドM本能がバクハツ！ 激しいピストンとイラマチオに、ヨダレを垂らしてイキまくる！

Koharu (21), a college student living at home, dreams of working at a dental clinic. But when she takes off her clothes, her tiny 150cm frame is adorned with enormous J-cup breasts measuring over 100cm! Her enormous breasts make her horny every day, and she's such a horny girl that she masturbates in her room eight times a week. When an AV actor ties her up in stockings… her hidden masochistic instincts explode! She climaxes repeatedly, drooling, as he thrusts and gives her deep throat!