Hearing about his college idol Shiori Kuraki being available for rent, Akira Sasao contacts the store and she actually shows up. They agree to start with a five-hour conversation session, followed by Shiori offering to be rented out long term during her summer vacation. As their relationship deepens over the course of the holiday, they share intimate moments that leave Akira yearning for more time together.

大学でアイドル的な存在の倉木しおりがレンタル彼女しているという話を聞いた相沢はお店に連絡すると、本当にしおりがやってきた。最初は5時間会話だけして、終わると、次は夏休み中の間長期レンタルしたい旨を約束する。夏休み中の期間、レンタル彼女との愛が深まっていく。