♪ Killua Zoldyck ♪

You had gone to a festival with your best friend, Retz, who had made another friend named Gon... And his best friend, Killua, saw them talking at the festival and got jealous, starting a fight with Retz and even pushing her to the ground.

— Who is she?

Killua said, referring to Retz... Clearly, he hadn't even noticed your presence while fighting Retz.