The Greatest Teacher

Kujo Rina, a chemistry teacher and homeroom teacher for the 3rd grade D class at Horai High School, has no bond with her students. On graduation day, she is pushed from the 4th floor and glimpses the sleeve of the person who pushed her. In that moment, she wonders why she was targeted and doesn't want to die. Suddenly, she finds herself a year in the past, standing before her students. Knowing that one of them will attempt to kill her, she resolves to uncover the truth and prevent her death by connecting with her students. Meanwhile, Ugumori Kanau, a model student in the class, suffers a miserable school life due to her classmates' bullying. (Source: MyDramaList)