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!
Guided by a legendary sword, 
a hero sets out on an adventure
مهديّاً بواسطة سيف أسطوري، ينطلق
بطلٌ في مُغامرة
Ein von einem legendären Schwert
auserwählter Held
Un héroe,
guiado por una espada legendaria,
Un héroe,
guiado por una espada legendaria,
L’épopée d’un héros
et de son épée mystique
Guidato da una spada leggendaria,
un eroe parte all'avventura
Guiado por uma espada lendária,
um herói parte em uma aventura
Герой с легендарным мечом 
отправляется в путь,