Kayano Yuuna is studying culinary arts at Murota Academy. Her ambition to become a cook began in childhood, when she was on the verge of collapse from hunger and a stranger served her a bowl of pescatore she never forgot. Years later, she meets Nasu Haruto, a substitute teacher — and at the restaurant Arcobaleno where he works, she orders a pescatore that tastes exactly like that one. She asks Haruto, restaurant owner Komatsu Ryuunosuke, and manager Saotome Nichiki if she can work there. They agree, reluctantly, on the condition that she first passes a cooking test alongside her classmates Kaname and Fuuta.