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!
Is this because we were calling 
Kyotaro-senpai an old man yesterday?
هل هذا لأننا كنّا نطلق على كيوتارو-سينباي
بالعجوز البارحة؟
Ist das, weil wir Kyotaro-senpai
als Opa bezeichnet haben?
¿Es porque llamábamos viejo
a Kyotaro-senpai ayer?
¿Es porque llamábamos viejo
a Kyotaro-senpai ayer?
On est maudits
parce qu’on a traité Kyôtarô
È dovuto al fatto che abbiamo dato
del vecchietto al senpai Kyotaro?
Isso é porque estávamos chamando
o Kyotaro-senpai de velhote ontem?
Неужели это потому, что мы
назвали Кётаро стариком?