誠実な彼氏・優介と幸せな同棲生活を始めた大学生のそあは、引越しの作業中に腰を痛めてしまう。優介の勧めで派遣マッサージ師の中原を呼ぶが、彼は女性客を快楽に溺れさせる変態施術師だった。巧みな手つきで執拗に焦らされ、心身を支配されていくそあ。清廉潔白だったはずが中原の虜となり、優しい彼氏に嘘を重ねながら、禁断の快楽から抜け出せなくなっていく。

Soa, a college student who has just started living happily with her honest boyfriend Yusuke, hurts her back while moving. At Yusuke's suggestion, she calls in a freelance masseur named Nakahara, but he turns out to be a perverted masseur who seduces female clients into pleasure. With his skillful hands, he relentlessly teases her, and Soa's mind and body are taken over. What was once a pure and innocent girl becomes captivated by Nakahara, and while lying to her kind boyfriend, she finds herself unable to escape the forbidden pleasure.