Not sure if everyone here knows about Manyuu's Specials but so far there are 8 more videos after episode 12, each lasting only a few minutes long (some aren't really animated). Heads up it's more BE-ish rather than BE. Wonder if there is more to watch or perhaps any news on season 2. Btw these quickies are uncensored.
http://www.watchanimeon.com/anime/manyuu-hikenchou/