An alternate version of what really took place in Strelitzia's cockpit during Episode Three. Mitsuru takes Hiro's place as Stamen-- but Mitsuru is about to learn what Zero Two really does to her partners...
Fanaticism tells the story of a maid who's hired to be the help for her new master. During the day she helps with the simple cleaning of the mansion but by night, she helps her master with his "sexual education training" so he can be a proper master of the house. But due to her gaining more favor with the master and slowly falling for each other, the rest of the help in the household plot to teach this maid her place.