A culinary genius by the name of Ajiyoshi Yoichi runs a restaurant with his mother. One day, Murata Genjiro visits the restaurant and is blown away by Yoichi's exquisite katsu-don. Yoichi is then invited to the Aji-oh building to compete in a spaghetti cook-off against the Italian chef, Marui. With his innovative culinary approach and passion for providing the ultimate dining experience, Yoichi triumphs over Marui. This victory propels Yoichi into a world of fierce culinary competition as he strives to create the tastiest and most impressive dishes around.