This is the story of the greatest bloody revenge and manipulation of feelings and emotions. Our protagonist, Saiko, is a high school teenager who lives alone after his parents died in a car accident. He is a failure in his life, and the only thing he possesses is his deductive reasoning. After a while, he decided to end his life by suicide. Subsequently, he was chosen by the gods to be reincarnated as the hero in another world to defeat the demon king with the help of his new companions. However, he was ultimately betrayed after defeating the demon king and met the gods again, who were fascinated by his story of betrayal and sent him to multiple worlds where he met worse fates than before, with his memory being sealed each time he was sent. Eventually, the gods grew tired of him and cast him into the dark abyss. Saiko vowed revenge on all the gods and people in the multiple worlds who betrayed and hurt him with all his hatred.