Rihito Hoshino, a bashful individual of 26, experiences anxiety when receiving change from a female cashier at the convenience store. To overcome his unease around women and mature as a person, he decides to take a leap of faith and book a rental girlfriend. To his surprise, he is paired with Tsukita-san, an eccentric young lady who goes beyond his expectations. As her efforts exceed his capacity, Hoshino-kun finds himself struggling to cope.