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!
This is terrible! We just 
keep on getting older.
هذا فظيع! نزداد شيخوخة
Was soll das?
¡Esto es terrible!
¿Seguiremos envejeciendo?
¡Esto es terrible!
¿Seguiremos envejeciendo?
Ça ne va pas !
On vieillit de plus en plus !
È terribile! Continuiamo a invecchiare.
Isso é terrível! Estamos
envelhecendo ainda mais.
Какой кошмар! Мы всё стареем и стареем!