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!
He's as forgetful as an old man.
إنه كثير النسيان كعجوز
Er ist so dement wie ein alter Mann.
Es tan olvidadizo como un viejo.
Es tan olvidadizo como un viejo.
Tu as autant de mémoire
qu’un petit vieux.
Ha la memoria corta, come un vecchietto.
Ele é esquecido como um velhote.
У тебя память, как у старика.