Sunohara Nozomu is at the end of his student life and, per his parents, overdue to live independently. Finding somewhere that feels like home has not been going well. His childhood friend Takanashi Shiori has a solution that surprises him: move in with her for one month and learn the basics. His parents agree before he has time to form an opinion. The month begins—shared meals, shared space, and the gradual realization that the arrangement is not as simple as it was presented.