自幼热爱剪发的私立十草中等教育学校学生灰村切（花江夏树 配音），每当见到黑色秀发的女孩便有为其剪发的冲动。偶然机缘，它在某个白色洋房结识了拥有一头秀美黑发的少女武者小路祝（小岩井ことり 配音）。令切难以置信的是，祝的头发仿佛被诅咒了一般根本无法剪断。利用杀人魔祖先留下的剪刀，切成功剪断祝的头发。谁知却引来性格阴暗的病院坂病子（福原香织 配音）的追杀。原来祝是发之女王的后代，传说只要能够杀死她便能实现任何愿望。围绕着纷扰凶险的命运和各种诡异的“杀害遗品”，切和祝的身边凶相叠现，而他也决定守护作为普通女孩的祝…… 本片根据绯键龙彦的漫画原作改编。

Shogo Mikadono is the son of an industrial magnate named Kumagoro Mikadono who passed away. As a final wish, Kumagoro imposed a condition Shogo must meet before he can inherit the family legacy—find a female mate at school. Shogo transfers into a school to fulfill that condition. However, he learns that he has a younger sister from whom he was separated at birth. He does not know what his long-lost sister looks like, but she happens to be one of the students at his new school.