Mitsui Aika transfers school for 2 months as the price for being the Morning Musume member of the month with most goods selled, that's where she meets Soon DongWoon, they quickly becomre friends, and even when Aika goes back home, she never forgets him and they always keep in touch with each other. What happens when suddenly Aika's group Morning Musume is advancing to Korea and you'll end up in a program with him?