The Demon King's Castle Building Chronicle!

『Exclusive Skill: "Congratulations. I welcome the birth of the new Demon King." In a different world, countless Demon Kings build labyrinths, using human emotions as sustenance. The newly born Demon King Procell declares to the senior Demon Kings that he will coexist with humans using a completely new method. The first step, the girl who appeared before Procell through his skill is an S-Rank monster, "Tenko". With Procell's intellect and the gathering of the strongest monsters under his command, the common sense of the other world is about to change drastically. This is the story of a peculiar Demon King, gentle to his allies but cold to his enemies. The revised version and additional chapters are also included in this book!』