After leaving the popular idol group JPX48, Ai Narata starts a new journey into the world of the Kouka Revue, an all-female musical theater troupe. It's there that she meets Sarasa Watanabe, a tall, semi-obnoxious go-getter with lofty dreams.

Yamada struggles to keep up with the rest of her class. As her diet grows more extreme and more detrimental to her health, she begins to wonder if she really belongs in the world of Kouka.

The first-year class gets another opportunity to act, this time in front of a crowd at the Culture Festival. However, there are only four roles, and forty students, which only means one thing: auditions.