From the introduction: Welcome to the world of Nawashi , a bondage-themed ero-manga series by Inoue Yoshihisa. The nights of modern Japan are haunted by ayakashi , or evil spirits, which possess people and drive them to commit immoral acts against their wills. These spirits are hunted by families of exorcists and shrine maidens, using sacred power and blessed weapons to exorcise these phantoms before their victims can bring harm to innocent people. One such shrine maiden is Hina Hachisu, who lives the life of an ordinary high school girl by day and hunts ayakashi by night with help from her sister, Mana. But one fateful evening Hina encounters Narushika Amagase, a “rope master” who exorcises spirits with divine shibari techniques. Hina dislikes him immediately, both for his arrogant machismo and his perverse exorcism rites, but she’ll soon find herself needing his help to deal with an evil rope master with diabolical plans for herself and her sister… and discovering some new things about her own sexual desires along the way.