All Heavens Box Court: King of All Realms

A game planner who died suddenly at his workstation opened his eyes in the small garden and awakened the gift of "usurping the laws of the heavens". From then on, he held the key and knocked on the door of the world - rewriting the devil's chessboard at Kuao Academy, kidnapping the alien princess at Ainan High School, snatching the true ancestor's familiar beast on Genkami Island, cutting out the non-existent Type 13 on Taisho Night, signing the Wagtail Contract above Tokyo, and carving the word "King" into all the legends on the Grand Line. And when he collected all seven coats of arms, he discovered that the thing he had traveled around seven worlds to find had been hanging at the door of his home.