The first episode of the 3D hentai series Oni-Tensei introduces detective Reiko Kure investigating a strange massacre. A quiet woman named Ema Nozomi is the only survivor at the scene, and she is taken into protective custody. The series is based on an ancient legend about a tattoo that comes to life when drawn to perfection. This uncensored episode runs for 23 minutes and features futanari content in 3D animation. The story sets up a dark, erotic mystery involving Ema's demonic tattoo.