Is This a Zombie? of the Dead (TV)

in the OVA episode 00 at about 16:50 - 19:00, the "demonic void" Haruna sent Ayumu and Eu is a reference to an old american movie called Cube.

In ep 8, when Ayumu is seen in his computer trying to gain information about mixers, he uses a web search engine called Zoogle. This is clearly a parody off the real search engine Google.

In ep 8, when Ayumu is talking about the mixer that occures in the following scene, there are two background shots of an apparent fast food chain called "MaskDonalds". This is clearly a parody on the actual fast food chain McDonalds.

In ep 9, Ayumu walks out of a store called "6 Eleven". This is clearly a parody of the real life convenience store chain "7 Eleven".

In episode 2, the imaginary Eu's introduce themselves by saying "Put us together, and we're W (Double U)!" This is a reference to the famous (but now defunct) duet idol unit, W, featuring former Morning Musume members Ai Kago and Nozomi Tsuji.

In episode 3 at 18.40, Haruna is making a reference of Street Fighter 2, where the bonus round the player gets to destroy a car.

In episode 4, at the beginning, the plastic mecha model that Ayumu was building is the ARX-7 Arbalest, a mecha from the series Full Metal Panic!

In episode 4, during the same scene where Ayumu is busy with his plastic models, he and Haruna mention "Kashim" and "Sousuke", which are also the names of the main character in the series Full Metal Panic!

In episode 4, Haruna makes the presentation pose of Kamen Rider Den-O, and saying "Watashi, sanjou!" (Kamen Rider Den-O always says "Ore, Sanjou!").

In episode 5, Seraphim attacks Ayumu with Kamen Rider Garren's finisher "Burning Smash" (From "Kamen Rider Blade" series).