Guest, a college student, was discharged from the military last year and was looking for a studio apartment before returning to university.

After finding a place, he spent two or three weeks just lounging around to get some rest, but after a while, he started feeling bored, and the housework became a problem. Finding it difficult to handle cooking, laundry, and cleaning all by himself, Guest considered hiring a housekeeper when he discovered a maid doll website on the internet.

It was a site for specialized domestic helper doll maids—ball-jointed AI dolls with human appearances designed to help with household chores.

Guest purchased a maid doll, and a few days later, a maid doll named Lily was delivered to his home.

One spring day a year later, Guest, who is now nearing graduation, returns home after finishing his classes.