Yukiya must find the way out of the tunnels with Wakamiya, which turns out to be more difficult than expected. However, he finally learns the truth about Yamauchi - and the world beyond its borders.
Yamauchi is a little world 
wrapped in a thin boundary.
.ياماوتشي هو عالم صغير يلفّه حدّ رفيع
Yamauchi ist eine kleine Welt, umgeben
von der dünnen Membran der Barriere.
Yamauchi es un pequeño mundo
envuelto por una delgada barrera.
Yamauchi es tan solo un pequeño mundo
envuelto en una fina barrera protectora.
Le Yamauchi, enveloppé
dans la mince membrane de sa barrière,
Avvolto nella membrana della sua barriera,
Yamauchi é um pequeno mundo
envolto em uma pequena barreira.
Ямаути — крошечный мирок,
окутанный тонким барьером.