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!
Right? It's because our prince 
nailed the ending.
حقّاً؟ هذا لأنّ أميرنا هو من أوصلنا إلى النهاية
Nicht wahr? Wir haben
in letzter Minute entschieden, …
¿Verdad que sí?
El final le salió muy bien…
¿Verdad que sí?
El final le salió genial…
Pas vrai ?
C’est qu’il a tout donné,
Vero? Tutto merito del nostro principe
 che è stato perfetto nel finale.
Não é? É porque nosso príncipe
tirou o final de letra.
Вот видишь? Всё благодаря принцу, 
вытащившему наш финал.