An animated spin-off from the Densha Otoko (Trainman) tv drama. 
In the drama, actor Itoh Atsushi plays the otaku Yamada, whose main love in life is the Mina anime, a cutesy busty heroine with floppy rabbit ears and carrots sticking out her rear. 
Mina itself is a character homage which triggers back to the Daicon Animation done by GAINAX where a similar nameless bunny girl appeared. Densha Otoko futher featured an opening with scenes which were appearing back in the Daicon Animation.

2 original unaired episodes included in DVD volumes 3 and 5, titled EX1 and EX2 respectively.

After establishing contact with extraterrestrial civilizations, it was found that humans were the only race to develop various sports. The number of alien sports fans grew dramatically, and the most fanatic of them regularly harass stadiums for taking part in a game, or demanding a good show, etc. Finally a treaty was settled, ruling all interferences towards other planets' cultures illegal. Rabbit Force, a group of rabbit-themed henshin girls, became responsible for enforcing the treaty and capturing any offenders. 
(Source: AnimeCouncil&sup2;)

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