The following morning, the group found that Carmelina had not returned before the Daylight Dreams set in. So, it stands to reason that they should first try to find her; if they didn't, her fate was clear.
Conversely, Yong-sun felt terrible and began to search for her immediately with Karu and Jin. They had not gone through something as bad as Yong-sun had, but they still didn't want anyone to die, especially because of their actions.
It could be said to be their actions as they did nothing to stop her from leaving, but this couldn't also be put on them, they were still young, but they also lived in a brutal world. But as Liam had given them a better chance to live a good life, they didn't want to ruin that.
Despite what they had gone through, the three boys still wanted to be good people.
Only Roy was left in the camp. He began to make breakfast for everybody and would stay in the camp if the girl was still alive and returned on her own.