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.
The seven lamps must 
represent seven mysteries.
.المصابيح السبعة لا بدّ أن تمثّل الألغاز السبعة
Sieben Lampen für sieben Mysterien.
Las lámparas representan eso.
Las lámparas representan eso.
Voilà à quoi elles correspondent !
Le sette lampade
rappresentano sette misteri!
As sete lâmpadas devem
representar sete mistérios.
Каждая лампочка — одна легенда.