In a world where humanoids are widely used for all sorts of purposes—housework, jobs, even as conversation partners— Ms. Komiyama is one of the few who, due to certain circumstances, doesn't own one. One day, a humanoid named Tani-kun is delivered to her home. The moment their eyes meet, he confesses his love at first sight and immediately proposes to her!? Thus begins a heart-pounding life under one roof with a love-struck humanoid!