Setoka Tachibana is a female high school student who has confessed her feelings to other boys 12 times, but has been rebuffed each time. Her older brother Haruka Tachibana cares for his younger sister deeply, but he keeps secret from her that they are not blood related. One day, Setoka's first love Takane Serikawa appears after many years and approaches her.

《暗黑女子》改编自秋吉理香子的同名人气推理小说，描述了女子高中美少女白石逸美神秘死亡以后，逸美同校文学部的少女们，开始以她的死亡为主题，各自发表了检举犯人的作品。由清水富美加和饭丰万理江担任双主演，由《百濑，朝向这边》、《战神：只是爱着你》的导演耶云哉治执导。
影片《暗黑女子》是一部由耶云哉治执导的影片，该片于2017年4月1日本上映。
本片围绕基督教名媛学校圣母玛利亚女子高等学院的理事长之女、全校同学羡慕的物件——白石逸美（饭丰饰演）神秘死亡的故事展开。
好友澄川小百合（清水饰演）代替逸美，继任了文学小组的会长而被成员们怀疑。她为了查明逸美死亡的原因并找出真凶，让成员们写关于「逸美之死」的小说，然后大家一起摸黑开朗读会。
清水富美加饰演文学部部长澄川小百合，白石逸美则由饭丰万理江出演。千叶雄大饰演的北条老师曾是学校文学部的顾问，因向身边工作人员讲猥琐话题被赶走，实际上拥有不为人知的秘密。
其他角色方面，保加利亚留学生狄安娜•迪切瓦由玉城蒂娜扮演，清野菜名出演作家高冈志夜；梦想成为甜点师的小南彩音由小岛梨里杏扮演，总是为奖学金而焦虑的二谷美礼由平佑奈扮演。

Teiichi Akaba is a student at a prestigious private male high school known for producing important politicians and bureaucrats. His dream is to become the prime minster and make his own country. To help achieve his dream, he wants to become elected as his school's student council president. The elected student president receives privileges and a better chance for promotions later in the political & bureaucrat world. A power struggle takes place surrounding the student election.