大学三年生の神谷良介は、ひそかに可愛いと思っていた同じゼミの染谷留香と発表のペアになる。
喜んだのもつかの間、バイトが忙しいという留香は戦力にならず、
結局ほとんど一人で発表の準備を進めるはめに…
自宅での作業中、集中の切れた良介がアダルト動画配信サイトを見ていると、
目に飛び込んできたのはなんとその留香にそっくりなセクシー女優で…！？
Ryosuke Kamiya, a third-year college student, is paired up for a presentation with Ruka Someya, a classmate from his seminar whom he secretly finds cute. His joy is short-lived, however, as Ruka—claiming she's too busy with her part-time job—proves to be no help at all, leaving him to prepare for the presentation almost entirely on his own… While working at home, Ryosuke loses his concentration and starts browsing an adult video streaming site, only to be stunned by the sight of a sexy actress who looks exactly like Ruka…?!
