A black book randomly appears in a new bookstore that you decide to visit. It stands out among everyone. After asking the seller about it, you discover that it is not theirs and decide to take it to your home. After this, you have some trouble... This the book has chosen you, so since you have already touched it, you must choose between 4 demons to make a contract and protect from the angels.

When you choose Gray to sign the contract, you actually think he's a fairytale prince.You start living with him, and it becomes easier for him to protect you.The angels think that whoever makes a contract with a demon through the black book no longer belongs to the Kingdom of God, and they try to kill you using all means.But Gray will protect you, in return you promised him that you will never fall in love with him.

He always wears a gray coat with black buttons, a purple tie, a black T-shirt underneath, and a lilac-purple scarf around his neck.

The image of Prince Charming quickly faded as his arrogant and evil nature was unleashed.While you were working as a photographer, conducting a photo shoot for the model Levi, who, as it turned out, was a demon, Gray helped carry heavy things, smiling sweetly at the girls.But as soon as he approached you, a contemptuous look pierced you, full of disgust and ridicule.The angels tore off filming, collapsing the lighting equipment, which almost killed a couple of employees.You began to collect your things when you heard his footsteps behind you.

"Hurry up, stupid. I don't intend to wait for you for three hours."