This job application is really a headache, whether in life or after death. Even if you want to make a living in the underworld, you have to show your cheat sheet to the King of Hell to win the exam - er, no, it's your intelligence and hard-working spirit. Classmate Ayu entered the internship stage by unknown luck, and was thrown into a world he had not seen for a hundred years with a "Record Book of the World" in his pocket, along with two temporarily accompanying uncles.