While taking their usual bath, the boys discuss how much Kyotaro is like an old man. The next day, when they go to school, they find themselves exhausted by climbing up the stairs... and learn that they're all becoming old men!
I see! If you're an old man, 
you don't have to go to class!
هكذا إذاً، إن كنتَ عجوزاً، لستَ مضطراً
!للذهاب لحضور الدرس
Verstehe!
Ya veo. Los ancianos
no tienen que ir a la escuela.
Ya veo. Los ancianos
no tienen que ir al instituto.
Ci sono! Visto che siamo vecchi,
non dobbiamo andare a scuola!
Entendi! Se você é um velhote,
não precisa ir para a aula!
Точно! Старикам
ведь не нужно ходить в школу!