The love between a guest and a host, isn't it the romance that everyone has dreamed of at least once? As the title suggests, it's the story of a guest and host falling in love. It flows without much of a ripple, but you feel the thrill of being immersed in the love of both.

Raphaël, 30 years old, has recently become single. Faced with the single life and long evenings alone, he calls his best friend Adrien one Friday night to ask him out. Adrien is not available, but he tells Raphaël about a mysterious application called "Boys-R-Us" that can fill his current lack of affection. This surrealistic application allows users to choose the boy of their choice who will immediately come and satisfy their desires... Raphaël tries the application the same evening, seeing with astonishment that it works, he uses the following days this strange and mysterious application by becoming addicted to it...