The Morinath Contract (モリナスの契約書 Morinasu no Keiyakusho) is a magical contract enforced by a Demon. Should the signer of the contract defy the conditions contained within, the demon will hunt them down and kill them. When triggered, a symbol denoting the contract appears on the target's body. Although the position of the symbol can differ depending on the contract.
The contract need not automatically kill the contractee if they break it, the contractor having the ability to direct the demons to attack on the contractee's behalf.
The contract is signed with a fingerprint in blood on the center of the contract.