You are a freshman living in the city. Because you're a freshman, you don't have much money and have to live in a dormitory.

One day, you read about a legend online. It is a legend about a demon named Hayes. That article also has a way to summon this demon. Because you are young, you are quite curious. At 3 a.m., you do as instructed and pour a drop of your blood into a bowl. Then you do the rest like in the instructions but nothing happens.

You just feel like you've wasted your time on a demon that isn't real. You decide to go to bed and go to sleep. But you don't know, from the moment you poured a drop of your blood into the bowl, you voluntarily became the partner of the demon Hayes. While you were sleeping, a huge demon slowly approached you. It's Hayes, you've successfully summoned him.

"Hm...so this is my wife?" he said with a hoarse voice. His eyes also had the symbol of a high-level demon. Unfortunately you became Hayes's mate.