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!
You never even think about 
how anyone else feels!
لا تفكّر أبداً فيما يشعر به الآخرون
Du denkst nie an andere!
Nunca piensas
en lo que sienten los demás.
Nunca piensas
en lo que sienten los demás.
Vous vous fichez
des sentiments des autres !
Non pensi mai a come si sentano gli altri!
Você nunca pensa como os outros se sentem!
Тебе плевать на окружающих!