Sorano Kazuki

Rod is an adventurer whose only skill is the supposedly useless \[Unlock], which lets him open treasure chests. Despite being mocked for it, Rod ventures into a labyrinth to make his dream come true, only to be sent flying to the deepest floor by a teleportation trap. But after an unexpected encounter with a “god” on the lowest floor, Rod’s useless skill glitches out and begins evolving into a cheat-level ability…?! Conquering the Five Great Labyrinths with the weakest skill! The grand opening of a “fastest dungeon conquest” adventure begins now!!

In a world where humans and demons clash, the one who decimated the Demon Lord's army was a lone hero named Lloyd. Possessing power so immense that he was said by the Demon Lord to be near godlike, after the war, Lloyd was appointed by the king to be the lord of a remote territory and was sent far away. Furthermore, he was tasked with subduing the Emperor Dragon residing in that land, which he quickly defeated. However, the defeated dragon transformed into a beautiful woman and chose to become Lloyd's companion!?

For incompetence, Lewin, a Demon-Tamer adventurer, was banished from the hero's party. Without being acknowledged for his achievements as a commanding officer... However, the moment he comes into contact with Sasha, the Demon King of Death, one of the sealed Seven Demon Kings, he awakens to become a Demon King with the ability to subjugate Demon Kings! Moreover, by shattering the seal, he tames the Demon King, Sasha—— Lewin, backed by Sasha, succeeds in drawing out the Demon King's power and works to subdue all Demon Kings, the root of the strife between the humans and the demons.