In the edo Period steam became a great power source which lead to the creation of mechanical dolls which forever changed warfare. Late in the era the shougan is failing to keep order fortunately for him his son was hidden away along with his greatest weapon, Susanoo. Now the time has come for Keniichirou to march to the capital to help restore order before it is lost to time. With his father's legacy weapon which has some pretty strict requirements, the pilot must be a Tokugawa, the pilot must be a virgin, and the pilot has to have a female virgin co-pilot to help as well. Man it really sucks when you have to be a virgin around several other virgins who are hot and all that stuff.