The testing continues even at 32,000 feet. Mumei and his classmates are especially challenged when their plane begins to experience mysterious turbulence. Meanwhile, while on an outing with his classmate, Haku, Mumei encounters a new rival. Who is this young man and why does he know so much about pens?
Ah, um, would you like to 
come along as well, Kou-san?
هل تريدين مرافقتنا يا كو-سان؟
Ä-Äh, möchtest du uns
begleiten, Kou-chan?
Este, ¿quieres venir
tú también, Kou-san?
Esto, ¿quieres venir
tú también, Kou-san?
Kou-san, ti andrebbe di venire?
Ah, e... que tal ir conosco, Kou-san?