Koko and Mika are popular actresses who are secretly agents, sworn to discipline the wicked men of the world. Koko is a dead-eye markswoman, while Mika takes down villains with powerful martial arts. Their anonymous boss has a habit of calling at the worst possible moment, like when Koko is filming a bathtub scene or Mika a bedroom scene for a TV drama. When a mission comes in, the pair abandon the baffled film crew, change into sexy outfits and head into action as the Abunai Sisters. The OVA is a set of computer-animated gag shorts that mixes comedy, action and ecchi fan service.