Sekine invites Chiyo to a sleepover at her house, and the other two invite themselves as well. They deepen their bond while Rikka learns more about the quirky cultural activities that take place on Earth.
Oh, it must be some kind of celebration!
¡Debe ser alguna celebración!
¡Debe de ser alguna celebración!
Sûrement pour célébrer un truc !
Oh, deve essere una sorta di sorpresa!
Ah, será que é uma surpresa?
А, наверное, в честь праздника!