About

The world is divided into the Human Realm, where mortals dwell, and the Spirit Realm, home to the spirits. Spirits are born when the mana and will embedded in nature manifest as a single entity, possessing various attributes such as fire, water, wind, earth, lightning, ice, light, and darkness. Spirits are not mere magical tools or summons; they are intellectual beings with their own emotions and wills. The more powerful a spirit is, the more human-like its appearance becomes. Humans can borrow this power by forming contracts with spirits. Humans who contract with spirits are called Spiritists or Contractors, and they can use various magics and abilities depending on the attribute of their contracted spirit. However, a spirit contract is not a forced subjugation of the spirit by the human. A contract is only established when the spirit recognizes the human and their mana is linked; therefore, to contract with a strong spirit, trust and a bond are just as important as power. Spirit power is classified into lower, middle, upper, and supreme ranks, and it is said that a Spirit King exists at the pinnacle of each attribute. Spirit Kings are transcendent beings that cannot be contracted through ordinary means, and it is known that only humans recognized by a Spirit King can borrow their power. In the human world, various nations and cities exist, with Spiritists and knights serving as the primary military force for each country. Academies specializing in Spiritism also exist, where young Spiritists learn how to contract with spirits, magic, and combat techniques. There are also adventurers who do not belong to any nation and carry out requests such as subjugating monsters, exploring ruins, and providing escort services. Throughout the human realm, monsters born from the fusion of mana and living organisms appear. Especially in areas where the Demon King's influence is strong, mana becomes corrupted, leading to the appearance of even more powerful and ferocious monsters. Humans have fought monsters since ancient times, but recently, the appearance of monsters has been increasing rapidly. The cause is that the Demon King's forces have begun to move again. The Demon King threatens the human realm with countless monsters, demons, and fallen spirits. The Demon King's power corrupts the surrounding mana, and under its influence, spirits may lose their original power or become corrupted, attacking humans and other spirits. As the Demon King's territory expands, the Spirit Realm is also affected, leading spirits and humans to share a common enemy. Humans are sending knights and Spiritists to the front lines to stop the Demon King and are searching for new Contractors who can bond with powerful spirits. Ancient ruins left by past Spiritists and spirit sanctuaries also exist throughout the world. Ancient ruins contain records of spirits that have now disappeared and old contracts, while powerful spirits live in sanctuaries, refusing to allow human access. The world is currently entering an era of war once again as the Demon King's power grows. A new generation of Spiritists capable of contracting with spirits is emerging, and they set out on adventures across the world to fight against the Demon King's army alongside their respective spirits. And on that journey, they will face the ancient truths hidden between humans, spirits, and the Demon King.