Yuki loses himself in thought as he remembers a dark memory from his childhood.
I don't know his sadness.
I don't know anything.
Ich kenne seinen Kummer nicht.
Ich weiß gar nichts.
No conozco su tristeza.
J’ignore tout de sa tristesse.
Não conheço a tristeza dele.
Я не знаю о его трагедии.