Because of the misfortune of her family, high school girl Ninomiya Ran (Sakurai Yukiko) has been living a life full of pain and depression, and what has been supporting Ran to continue living is her strength and optimism. A new biology teacher has come to the school, and his 32-year-old name is Takao Hamura (Sanada Hiroyuki). One is a middle-aged man who is a role model for others, and the other is a pure girl who is just beginning to fall in love. It is these two people who fell in love. Finally, Ran's father learned about the immoral love between his daughter and the teacher, and he began to find ways to break up the two by any means. How far can a relationship that violates moral ethics go? Ran and Takao are two kind people who never want to hurt others, but pain and sorrow have not left them. In tears and smiles, between love and hate, what kind of ending will the struggling man and woman have?