Opening an ordinary book—don’t utter the words of a voluntary crossing into an unfamiliar world! Didn’t you manage to resist? Ended up in the Demon Kingdom? Don’t forget to hide the Runes of Light on your hands. Encounter an disgraced demon? Expect plenty of surprises and journeys. With a snap of the fingers, a bright mage appears—and, by the way, a demon slayer? Trouble is guaranteed. Is the High Demon of the Kingdom hunting you? Make a deal and perform the ritual of accepting the Blood of Chaos.