Kami Taiyo, a guy whom never ate ramen before eats ramen for the very first time after a fight! He then started an interest in ramen and goes in deeper into it, hopes that everyone will taste a rainbow inside every ramen he cook. Together with Yūichirō Akagi, Hasegawa Fuku, Natsuki Takaoka and Harada Mitsuko, what things will happen to them?