The three Invaders return to their home prefecture of Hokkaido for a required summer school day. On the bus ride to school, Mone starts talking about Hokkaido's seven folk legends while Chihori shares random facts about space. As Yuina responds to the girls' wacky conversation with her usual comical comebacks, she is overcome with a very strange feeling about the situation.
I went home with her once, and there 
was this huge city underground.
ذهبت رفقتها ذات يوم وكانت هنالك 
.مدينة هائلة تحت الأرض
Una vez la seguí
y vi una ciudad subterránea increíble.
Una vez la seguí
y vi una ciudad subterránea increíble.
Una volta sono andata a casa sua
e c'era questa enorme città sotterranea.
Eu fui para casa dela uma vez,
e havia uma cidade enorme no subsolo.
Я как-то ходила к ней в гости.
Там огромный подземный город!