Specials bundled with the Blu-ray and DVD volumes of Overlord featuring simplified character animations.
Special - Sep 25, 2015
A series of comedic shorts featuring chibi versions of the characters of the main show.
Special - Apr 8, 2016
There's a new teacher in town—Spelunker! This unusual man is anything but a typical instructor, giving speeches about traffic safety to the students, reacting strangely to a humidifier, and enjoying lunch— albeit with ample condiment mishaps. With such a bizarre new role model to learn from, Spelunker's students will never be the same!
OVA - Mar 16, 2011
Set in the eastern Japanese prefecture of Ibaraki, Agukaru centers around Sanae Baraki, a farmer’s daughter who can see spirits. Every day she works on her field together with such spirits to produce the best agricultural goods. However, there is a group that aims for that field. With the blessing of the earth, she transforms into Agriculture Angel Baraki.
ONA - Sep 17, 2010
Sanae has now left the countryside to view the tourist wonders of the Ibaraki prefecture. Villains are still after her so her agriculture magic powers still come in hand.
ONA - Jun 6, 2014
The first half of the episode recaps the first episode of the first season and the second half is all new animation setting up for the second season as the characters go to cities rather than being out in the countryside.
ONA - Mar 28, 2015
The Ultra Kaijuu Gijinka Keikaku project transforms kaijuu (monsters) from the Ultraman live-action special-effects series into cute, female anthropomorphised monsters.
ONA - ??? ??, 2016