A young man travels through time and space by chance, only to end up in a fantasy world where Demon Lords and Dungeons existed alongside a system.

How will this young man survive this cruel and unforgiving world as a human, with only a small dungeon at the beginning, becoming the one and only true Demon Lord with the entire world in his grasp by the end?

Dungeons, Monsters, and the title of a newbie Demon Lord. Watch as Mana master this world's system one step at a time, and eventually, rule the world with his Legion that consisted of both humans and monsters!

Disclaimers: This novel is a work of fiction. The characters and places are from pure imagination. Additionally, there are mature contents inside. Read with caution.