Aiko was raised by tutor, it is still uncertain if her father still lives but her mom died in birth labor, The Kotoku family is just one of the many belonging to The Dragon Clan, an ancient secret society that teaches the most developed arts of Ninjutsu, though the Dragons are not the only ones, their major rivals are the Scorpion Clan who specialize in the Darker side of Ninjutsu (I intend to mix ninja arts and a bit of magic)

The Hadaka Matsuri was a milenary holyday to worship the godess of fertility So-Matsuri, though forgotten in time and forbiden by many rulers of Japan it was once openly practiced, but in the medieval days it was taken as an excuse for all sort of excesses so the Shoguns forbade it, centuries later the Tokugawa Clan took power of the Shogunates (they were the ones who established the capital city in Edo, today's Tokyo) beside the death and destruction of war, drough and plages were devastating the crops of rise, it was precisely an ancestor of Aiko, a concubine of the Shogun Hidetada Tokugawa, who had a vision that led her to a cave in which a statue of So-Matsuri was found, the shogun took it as a signial and re-allowed the holyday in 1605, the drough and plages were gone in no time and the land became fertile. Now that Aiko and her BF had turned 18 they will asist their first hadaka and once more the thing would spin out of control but this time the spiritual cresendo will set free evil spirits that will take the shapes of demons, a Kitsune among them, now only the most powerful ninjas will be able to stop them before they manage to open an interdimentional gate that would allow thousands of demons into our world to conquer it.