I Have a Contract with the Devil

"Become a hater of humans" This is the curse left by "her" who lives in my heart "How many times do you have to tell me before you understand? You only have one choice." "Either you, who is a disaster to this world, die." "Either this human world, which is a disaster to you, is destroyed. "That's not the case... I want to make a bet with you." "Then you give it a try..." In a ridiculous contract three years ago, I was forced to give the power of "destroying the world" to this demon at the cost of her temporary silence. I thought that life would eventually return to the peaceful daily routine of my sophomore year in high school - until this morning, there was a terminally ill girl beside my bed who claimed to be my "sister" Her name is Gu Yu, and her name is the bloody contract I signed. She has a long, straight black face as pure as an angel, but inside her body lives that bewitching demon. To make matters worse, she "kindly" returned her first power: "Cognitive Interference" - distorting other people's perceptions and making lies become truth. The peaceful campus life was disrupted, and I fell into the vortex of confrontation between the three parties. Demon, god, mediator "I'm looking forward to the day when you take all your power~ Which will collapse first, the world or you?" "It won't be like that..." "No way? Alas, but..." "But what?" "The demon hunters are here~ What are you going to do? Hehe" "I know that your own life is at stake, but what about this child?" "Ask for power! Let me see the side you hide deep in your heart..."