Yuki loses himself in thought as he remembers a dark memory from his childhood.
I didn't know what was so sad or frustrating.
Ich weiß nicht, was der Grund
für den Kummer war, …
No sabía lo que era tan triste
o lo frustrante para él.
J’ignore ce qui l’attristait
ou l’énervait.
Eu não sabia o que era
tão triste ou frustrante.
Не знаю, что его опечалило или разозлило,