"I tortured the hero of my story for my revenge."
The story is about Sabato Mokoto, a young man with a terminal illness whose hobby is writing novels. He died from the disease, but he finds himself in one of the novels he wrote in a character who was a childhood friend of the hero of the story, but she died early. He discovers that the hero is the one who betrayed him, so he decides to take revenge on him with the most severe types of torture.