"Kairaku Satsujin Chousakan Koji Episode 1," also known as "Demon Warrior Koji," introduces viewers to the dual life of Koji Yamada—a stuntman by day and a Sex Murder Investigation Officer by night. In this episode, Koji is tasked with investigating a series of gruesome murders characterized by extreme dismemberment, believed to be the work of supernatural entities. Aided by a morbid psychic, he follows the grisly trail of victims to a lonely woman, uncovering unspeakable horrors that challenge his demonic abilities and human resolve. The episode masterfully blends horror and supernatural elements, delivering intense action sequences and exploring themes of identity and redemption. The animation vividly portrays the grotesque and eerie atmosphere, immersing viewers in a world where demons lurk beneath human facades. "Kairaku Satsujin Chousakan Koji Episode 1" sets the stage for a gripping and dark narrative, captivating audiences with its unique blend of horror and supernatural intrigue.