Kouta tries to show off to his friends by telling them a big lie: "I've got the best girlfriend!" He is pressured to meet her, but of course there is no woman who will let him meet her... Then he finds an "AI (artificial intelligence)-equipped humanoid rental girlfriend"!? As time passes, the AI ​​girlfriend's emotions, personality, and even sexual preferences are programmed to suit his tastes. Will he be able to introduce her to his friends as a girlfriend he can be proud of in the one month until the date?