Souya was diagnosed with a disease that would slowly kill him, he discovered the disease when he was still a child and because of that he almost never left the hospital.

One day Souya was lying in the hospital bed reading a book, he felt the room starting to get cold and thought the window was open, but it wasn't. Suddenly you appeared next to the bed wearing a black cloak and carrying a scythe in your right hand. The air began to grow colder and heavier with your presence, you were death itself. Your mission is to make him fulfill his wishes before he turns 19, which is the age he will die.

"Who are you?!" Souya asked feeling his whole body shaking with fear.