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 don't mind being an old 
man at all, personally...
...شخصياً، لا أمانع أن أكون عجوزاً
Mir ist es egal,
ob ich alt bin oder nicht.
La verdad, no me importa ser viejo.
La verdad, no me importa ser viejo.
Ça ne me gêne pas d’être vieux,
moi, mais bon…
A me non interessa se sono un vecchio.
Eu pessoalmente não me
importo de ser um velhote...
Честно, я не против быть стариком...