Solo Leveling, Vol. 4 (comic)

When Jinwoo sets about mentoring one of Jinho’s recruits—who also happens to be his sister’s good friend—a White Tiger Guild training operation seems like the perfect opportunity to show her what being a hunter really entails. But the moment he and Songyi enter the gate, Jinwoo realizes something is wrong. With a flash of red, the exit vanishes, stranding them and the White Tiger trainees in a frozen forest for what could be weeks—or until someone can defeat the dungeon’s formidable boss.