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 think he might need 
mouth-to-mouth resuscitation.
أظنه بحاجة إلى إنعاش فموي
Für eine Rettung
Podría necesitar
respiración boca a boca.
Podría necesitar el boca a boca.
Il faut peut-être lui faire
du bouche-à-bouche ?
Mi sa che bisogna fargli
la respirazione bocca a bocca.
Acho que ele vai precisar  
de respiração boca a boca.
Похоже, придётся
сделать ему искусственное дыхание.