Hisaya Minato, a normal high school student, has a female friend who is a bit peculiar. She is Aoi Hatsuki, the most beautiful girl in the high school. For some reason, they get along very well, and since they happen to live on the same floor, they gradually become good friends, coming and going from each other's houses. One day, Minato suddenly asks her to show him her panties. At first, Hatsuki is reluctant, but then she starts to roll up her skirt?

Hirono Hiro is a high school student, and secretly a shoujo mangaka, to all but his childhood friend and kouhai, Kei Shindo. One cold Christmas after meeting a mysterious woman in church, a strange girl steals his bike. Running after her, he finds her collapsed on the street. Learning her name is Miyamura Miyako and that her bag was stolen by a man on a motorbike, Hirono finds himself spending time with Miyako, much to the dismay of Kei…

Tokyo Swordia, formerly known as Tokyo Metropolitan, has been ruled by the "Swordie" since the Third World War 70 years ago. These Swordie, natural-born swordswomen with an attraction to blades, more or less rule the country, and are considered upper-class members of society. In order to raise his own social status, Kurou, a human, begins attending an academy of swordsmanship, surrounding himself with Swordies on a daily basis. How will he fare in combat against those born to fight?