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!
Come on, I'm just as old 
as the rest of you...
...مهلاً، أنا كبير مثلكم
Nein, ich bin jetzt auch alt …
No, yo soy tan viejo como ustedes…
No, yo soy tan viejo como todos…
Oublie, je suis tout aussi vieux
que vous.
Beh, ma io sono vecchio come tutti voi...
Qual é, estou tão velho quanto vocês...
Эй, я вообще-то тоже старик...