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?
Its core has been subjected 
to special processing,
مرّ مركزه بمعالجةٍ خاصة
Su cartucho pasó por un proceso especial
Su cartucho pasó por un proceso especial
Ce stylo a une fonction spéciale
très pratique.
Il suo inchiostro è stato sottoposto
 ad un processo particolare,
Ela tem um núcleo que foi 
submetido por processos especiais.