In this video, we follow the story of Hounounozono (Honou no Zono), a stunning woman with 100cm I-cup breasts. She is participating in a study conducted by Japan's only public paizuri research institute - Paizuri Laboratory. The purpose of the study is to thoroughly examine and document Honou's exceptional skills in performing the intimate act of paizuri (breast fondling). The setting takes place in a dimly lit laboratory where Honou, dressed in her school uniform, stands patiently awaiting instructions from the male researchers. One of them approaches her from behind, caressing her perfect breasts through her uniform before undressing her completely. They then begin an intense observation session, capturing every detail of Honou's voluptuous body on camera as they explore her breasts using various tools such as oils and acrylic boards. Next up is a series of challenges designed to test Honou's abilities in different scenarios involving dildos and penetration techniques. With each successful task completed under close supervision from the research team, she earns their approval while also arousing them immensely. As a reward for passing these tests with flying colors, Honou gets to indulge in some hardcore action herself! She engages in passionate sex with multiple members of the research staff, taking turns being pleasured orally and anally until they all cum inside her massive cleavage. Afterward comes another round of experiments involving soapy bath water and foam; this time around focusing more on stimulating her sensitive nipples during a sensual breast massage accompanied by bubbles and soap suds. Finally comes what appears to be the ultimate challenge – a group orgy featuring all participants surrounding Honou as they take turns fondling her enormous breasts while using various sex toys like rotators, vibrators, and dildos to bring her to unprecedented heights of pleasure. Her moans echo throughout the room as wave after wave of ecstasy washes over her body until finally collapsing into a puddle of satisfaction beneath the weight of countless loads discharged onto her chest by the exhausted yet satisfied researchers.

日本で唯一の公的パイズリ研究機関「パイズリ研究所」今回の被験者は100cmIカップ巨乳の羽月乃蒼ちゃん、ハリのいい美巨乳のパイズリをたっぷり研究していく。 暗い研究室に、制服姿で立たされた制服姿の乃蒼ちゃん。研究員の男が後ろから近づいていき、ゆっくりと巨乳を揉んでいく。制服の上からでも、巨乳の質感がこちらに伝わってくる。揉まれているうちに興奮してきた乃蒼ちゃんにオナニーさせる、乃蒼ちゃんは激モミオナでイキまくり。制服と脱がせ、巨乳観察、乃蒼ちゃんのおっぱいにオイルを垂らして揉みながら、透明のアクリル板に押し付けテカテカに光沢を帯びた巨乳の形状が変化する様を記録していく。そしてディルドを相手にパイズリ。縦、横、下乳、乳首擦り…とパイズリ指導され射精まで導かす。 ディルドパイズリに合格した乃蒼ちゃん、今度は研究員のチンポでパイズリ。唾液をたっぷりと垂らしたフェラでフル勃起させた後、様々な変化を付けたパイズリを披露させる。研究員達はたまらず大量の精子をぶちまる！ スケスケのスク水を着た乃蒼ちゃんに大量の泡ソープで、泡洗体実験。洗体させつつ、おっぱい揉みまくり、感じさせながらの泡パイズリ。 そして最終実験、全研究員達に取り囲まれ、集団で巨乳を揉まれまくり、ローター、バイブ、ディルド…と立て続けに玩具で責め立てられて、アヘ顔を晒してイキまくる。 そして研究員達のチンポにがっつきフェラ。勃たせたチンポを次々と行列パイズリ、パイ発射、巨根研究員たちと巨乳バク揺れファック、潮を吹きちらかして大絶叫激イキ！ イッてもイッても更なる追撃ファックで研究員たちの大量の精子が乃蒼ちゃんの巨乳にぶちまける！※ 配信方法によって収録内容が異なる場合があります。