Five students are trying to find out more about one of their hometown's oldest folklore that is now made into a video game, Aooni. The closer they get to the truth, the darker things get.
Ao Oni: The Animation (あおおに〜じ・あにめぇしょん〜) is a TV anime series based on Ao Oni, however, instead of being dark and scary like the game and the film, it takes a more comedic route, involving Hiroshi, Takuro, Mika, and Takeshi trying to escape from the mansion while encountering comedic situations with The Oni, which in a way or two penetrates you with his fist.