Somewhat based on the real story of how Gainax was founded, Otaku no Video addresses all aspects of an otaku lifestyle. Ken Kubo is a young man living an average life until he is dragged into a group of otaku. Slowly, he becomes more like them until he decides to abandon his former life to become king of otaku—the otaking! Mixed in are live-action interviews with real otaku, addressing every aspect of hardcore otaku life. Not only are anime and manga fans included, but also sci-fi fans, military fans, and other groups of Japanese geeks.

Two siblings were happy on Mt. Olympus, until they fell in love. Deimo's sister Venus got imprisoned in the Swamp of Death. To save Venus's life, he must find a human reincarnation so that they can continue their love.

Episodes 12–17 of Dies Irae released exclusively on the web.

The first 45 minutes is a recap of the original series and the remaining 40 minutes has a new story. Two months after Creamy Mami's final concert, rumors began to spread that Mami was making a come back, and if that wasn't surprising enough, Tachibana starts a "Project M" and that seems to have something to do with Mami's come back. As word of Mami's concert reaches the public, Yuu dosen't belive it. Yuu, Megumi, Toshio, Midori, Kidokoro make a plan to get to the bottom of it.