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.
Ah, the monster that lives in 
Lake Kussharo in Teshikaga.
.الوحش الذي كان يعيش في بحيرة كوشارو في تيشيكاغا
Ah, el monstruo del lago Kussharo
de Teshikaga-cho.
Ah, el monstruo del lago Kussharo
de Teshikaga-cho.
Ah, la créature du Kussharo,
le fameux Kussie.
Ah! Il mostro che vive
nel lago Kussharo a Teshikaga.
Ah, o monstro que vive no Lago
Kussharo em Teshikaga.
А, точно. Морское чудище
озера Кушаро в Тесикаге, Кусси.