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.
O-Of course I knew that!
D-Das wusste ich, ist doch klar!
¡Por supuesto que lo sabía!
¡Pues claro que lo sabía!
Bah oui, je le savais déjà !
Certo, lo sapevo!
C-Claro que eu sei disso!
Да, конечно, я всё знала!