Childhood friends Aoi Satsuki and Arata Uzuki are tasked with producing a fan event as part of a TsukiRadi project. Aoi, the considerate and kind prince of Gravi, selects "adventure" as the event's theme.

Believing adventurousness to be something he lacks, Aoi works extra hard to come up with an event concept with Arata. The answer they arrive at is a puzzle/escape room at the zoo that will give guests a taste of the extraordinary. The younger members take on the role of the guests as they begin rehearsing for the event!
Which means we need people 
to play the part of guests.
ما يعني أنّنا نحتاج لأشخاص كي
يلعبوا دور الضيوف
Das heißt, dass wir
die Kunden spielen müssen.
En ese caso, necesitaremos jugadores.
En ese caso, necesitaremos jugadores.
Pour ça, il nous faut des figurants.
Quindi ci serve qualcuno
 che faccia da partecipante.
Ou seja, precisamos
de gente para serem as fãs.
А значит, нам нужен народ 
в качестве гостей.