Ema Hinata is a senior student in the idol division under the same production. She showed off her leadership skills even at a camp that she went to. Mio looks like she isn't fitting in well with this environment, and this causes a chain on confusions. What's so interesting that's happening now around her..?

Mio is a top idol, and she always gathers the eye of the public. Word is heard that a famous world-class creator is to be chosen as a director for a commercial for macarons. Mio is to be filming the commercial when they are faced with a surprise: The background music is an Ondo, and is not fit for a macaron commercial!? Now Mio is up to a challenge: Can she make an impactful "Big Bang" CM when nothing goes as Mio had predicted?