Solo Leveling, Vol. 3 (light novel)

When Jinwoo gets his rank reevaluated, the results are even better than he could have
dreamed of...but more importantly, a chance to heal his mother from her strange
illness falls into his lap. In order to find the cure, he must make his way further into
the Demon's Castle-and now that there's finally hope at the end of the tunnel, nothing
can get in his way.