Kazuya Kinoshita, a college freshman dumped by his girlfriend Mami Nanami after one month, rents a girlfriend through a mobile app and is matched with Chizuru Mizuhara, who plays the part flawlessly. When his hospitalized grandmother meets Chizuru and assumes she is his real girlfriend, Kazuya discovers that the two are next-door neighbors attending the same university, trapping both in a fake relationship neither can easily escape.