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!
I was surprised to learn after the fact 
that there were supposed to be extras.
أنا متفاجئ من أنّه كان يُفترض
أن يأتي ممثّلون ثانويّون
Später haben wir erfahren,
dass eigentlich Statisten da sein sollten.
Me sorprendí mucho cuando me enteré
que deberían haber habido extras.
Me sorprendí mucho cuando me enteré
de que en realidad teníais extras.
J’ai su qu’après
qu’il devait y avoir des figurants !
Sono rimasto sorpreso quando dopo abbiamo saputo
che avrebbero dovuto esserci delle comparse.
Foi um susto saber que era
para ter figurantes.
Позже меня изрядно удивило, что 
у вас должна была быть массовка.