He is a prey that is inexplicably targeted by a perverted murderer. At some point, he discovered that every move in his life was being monitored. He panicked and hid everywhere, but that person filled every corner of his life like a shadow. Just as he mustered up the courage to try to track down the person behind the scenes, his relatives and friends began to be brutally killed one by one. He tried his best to protect them but failed. Although the perverted murderer never harmed him, he still fell into deep despair. In order not to let innocent people get hurt again, he had no choice but to close himself up and not come into contact with anyone. Until a few years later, he met the girl who attracted his attention. His heart was struggling, but he still wanted to be with her because of the long loneliness. He had been protecting her cautiously, carefully not letting anyone discover the relationship between the two, and not giving the perverted murderer a chance to hurt her. However, the girl still fell bloody in front of him. Heartbroken, he carefully recalled every moment of the two people's interaction, and finally he realized that the perverted murderer he had always been was just another personality split in his mind, and it was he who killed everyone around him.