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!
Sounds like they're feeling pretty okay.
يبدو وكأنّهم يشعرون بأنهم بخير
Ah, scheint, als hätten sie
das gut verkraftet, oder?
Parece que se sienten bien.
Parece que se sienten bien.
D’après ce que je comprends,
ils ont retrouvé la forme.
Ah, sembra che si sentano piuttosto bene.
Parece que eles  estão se sentindo bem.
Похоже, они неплохо себя чувствуют.