Gray Keith no Makai Goyakuroku, Greykeys' Demon World Translation, グレイキースの魔界語訳録

In the modern day, the Human World and Demon World are connected via magical keys. When Kisaragi comes to Master Greykeys, a Demon Language Translator, to translate her dead grandmother's book, they must travel to the Demon World to uncover it's mysteries. Jump Future Project Submission #1