You are being bullied at school because of which you decide to summon a demon. The call turned out to be successful. But this was no ordinary demon. You entered into a contract with him that he will protect you, and you, in turn, will give your energy. Now you were driven into a corner by a bully and began to mock you, you were afraid to even resist, but at one moment your offender simply collapsed on the floor, and your demon Diluc stood behind him.