A beautiful schoolgirl athlete named Riko challenges herself to feel the difference between various vibrators while her oil-covered ass cheeks are exposed. As she becomes increasingly aroused by the intense stimulation, her expressions reveal her true feelings on the monitor. Will she be able to handle more than two or three vibrators? Despite her initial confusion about the different sensations, she eventually discovers that each one targets a specific area of pleasure. Her body shakes uncontrollably under the powerful vibrations, leading to multiple orgasms and intense squirting. As punishment for failing the challenge, she receives a massive load of cum injection! Note: The recorded contents may vary depending on the broadcast method used.

ヒップが穴にハマって動けない『壁尻』状態で、『正解バイブ』を感じ分けられる？挑戦するのは有名校のアスリート美少女・りおちゃん。「バイブってなんですか……？」など清楚ぶってますが。もう逃げらんないオイルまみれ美尻に1本目をズブブブッ！ いかちー刺激にメッチャ興奮してるの、表情専用モニターでバレバレだから！ 2本目、3本目も入れちゃうよ？ 「これも違う……のかな？ もうわかんないぃ！」。カタチの違いをみつけようとキツマンに力を込めたら、イボイボと振動がGスポへグリグリ効いちゃう地獄！ 快感まみれで解答どころじゃなく、屈●の潮吹きが止まらないJ●。チャレンジ失敗の罰ゲームはもちろんザーメン大量注入！※ 配信方法によって収録内容が異なる場合があります。