早濑美月(波瑠 饰)和母亲早濑显子(齐藤由贵 饰)过着相依为命的生活,在显子的帮助和支持下,二十五岁的美月在高中教授英语课,这是一份人人羡慕的工作。外人看来,美月和显子之间的感情十分要好,两人亲密无间就好像姐妹一般,但实际上,显子常常会显现出偏执而又充满了控制欲的一面,母女两人之间的关系在平静的表面下暗涌着滚滚波涛。 某日,美月结识了在早濑家工作的松岛太一(柳乐优弥 饰),太一英俊而开朗,两人在一来二去之间发现彼此十分投机。眼看着美月和太一走得越来越近,显子渐渐开始感到了恐慌,她决定依靠破坏女儿和太一之间的关系,来达到将女儿留在身边的目的。This story describes how the mother Akiko and daughter Mizuki are like best friends and lovers. The nature of their relationship does bother Mizuki's father Koji but he is too busy with work to do anything about it. Just then, when the family is planning to build a new house, they meet Matsushima who is assigned to be in charge of their construction project. At first, both Akiko and Mizuki hit it off with Matsushima which leads Akiko to encourage Mizuki to date him. However, once Mizuki starts going out with Matsushima, she realizes how she had been tightly controlled by her mother all this while and attempts to break free from this unhealthy relationship between them. When Akiko realizes what is going on, she resorts to extreme measures i.e. seducing Matsushima in order to get her beloved daughter back.