In this study, we focus on the research of big breasts in girls across Japan. Our current test subject is Tomoko Kamisaka, a busty beauty with Icup measurements. We observe her sensitive chest through her uniform while she plays with herself, moaning cutely as she explores her own body. To make her breasts more suitable for pounding, we massage them gently before applying oil and kneading them further. We then proceed to examine how her breasts deform under pressure by pushing them against acrylic boards. Next, we measure the wetness of her pussy when stimulated with a dildo during pounding. Finally, we conduct our ultimate experiment where multiple researchers use their penises to pound both her breasts and pussy simultaneously until they reach climax. Throughout the process, Tomoko becomes covered in cum from all the researchers' ejaculations. As she experiences intense pleasure from being filled up by so much semen, she reaches orgasm after orgasm.

全国の巨乳美少女のおっぱいを研究する痴的猥褻機関 パイズリ研究所！ 今回の研究被験者はIcup爆乳の神坂朋子ちゃん、敏感な巨乳を制服の上からグニュグニュ揉みしだき、可愛い吐息で感じる朋子ちゃんの爆乳を更に生揉み、オイル揉みしながらパイズリに適するおっぱいにするためほぐし揉みしていく。 ぐぬグニュ巨乳をアクリ版に押し付け変形、潰れ具合を研究、ディルドをパイズリさせながら感じてしまう美少女のオマンコの濡れ具合を観察、そして研究員たちのチンポでパイズリを研究していく。 パイズリでザーメン塗れになった巨乳をスク水の上から泡洗体で洗もみし欲情を高めていく。そして最終研究、複数の研究員たちのチンポを使ってパイズリ狂乱ファックで巨乳もオマンコも侵していく。 巨乳美少女の朋子ちゃんは研究員たちの大量ザーメンを巨乳に浴びながらイキ狂ってしまう。 ※ 配信方法によって収録内容が異なる場合があります。