Two students couldn't help but notice how stunningly beautiful and fit Miyuki was when they saw her riding her bicycle at full speed. They found themselves unable to forget about the sight of her perfect ass perched high up on the bike seat. The next day, while walking along the same path where they had seen her again, one of them mustered up the courage to approach her. In their excitement, they blurted out something stupid like, "Your feet are so incredibly pretty! How can someone become that beautiful?" To their surprise, she didn't seem offended by their comment and even invited them over to teach them some training techniques. Little did they know what kind of "training" awaited them...

ロードバイクで颯爽と駆け抜けていく朱音を目撃した学生ふたり。自転車に跨る彼女の尻のことが忘れられず、翌日も目撃した道をキョロキョロ歩いていると再会する。駄目元で「お姉さんの足が凄くキレイで声かけちゃいました、どうしたらそんなキレイになれるんですか？」と声をかけてしまう。「トレーニングに興味あるの？」と言われ、とっさにあるとウソをつくと、「だったら色々教えてあげる」と家に連れられ，，，※ 配信方法によって収録内容が異なる場合があります。