The "Gekokujou" (下剋上) subtitle refers to the lower-ranked overcoming the higher-ranked. This is realized through:
Originally a web novel (WN) by Ren Nanatani, the series was adapted into a light novel and later a manga serialized by under the Monster Comics label. Readers have noted a distinct shift in tone as it progresses, moving from dark fantasy isolation to a more generic "Musou" (unmatched) power fantasy once the protagonist leaves the dungeon. Literary Reception and Adaptation Kai constructs a small
III. Thematic Elements of "Gekokujou" (Overthrowing the Superior) boots) from dragon parts
By Chapter 2.1, the power dynamic has fully shifted; Kai is no longer the victim but a solitary figure ready to unleash his subjugated dungeon subordinates upon the outside world. IV. Literary Reception and Adaptation the power dynamic has fully shifted
Kai constructs a small house within the labyrinth and crafts legendary-tier gear (cloaks, boots) from dragon parts, rejecting his "trashy" old clothes that witnessed his suffering.