Tenka Momose was a quiet and withdrawn child, but before long she realized that the most effective way to protect herself wasn't hiding from the other kids—it was being the best at everything! After years of armoring herself with excellence, Tenka lives safely atop her cool-girl pedestal, admired and idolized by everyone. But her flawless composure is suddenly shaken by a very average schoolmate's impressively big dreams. At first Tenka is scornful of Erian Sato's ambition of becoming a K-pop idol, but the other girl's passion is so irresistible that Tenka soon finds herself with idol dreams of her own!