Kouhei Inuzuka has been caring for his small daughter Tsumugi to the best of his abilities after the death of his wife. However, due to his lack of cooking skills and his hectic schedule as a teacher, he is forced to rely on convenience shop ready-made meals to feed the small girl. Kouhei accepts an invitation from his student, Kotori Iida, to dine at her family's restaurant, frustrated by his inability to provide a fresh, nutritious meal for his daughter. However, the father and daughter realize on their first visit that the restaurant is frequently closed owing to Kotori's mother's absence for work, and that Kotori frequently eats alone. Kouhei chooses to continue despite his pupil's pleadings.