New Kids War Episode 1

Otsuki Kaori is a spirited, big sister-type elementary school teacher. She is assigned to a new elementary school to replace a teacher who was hospitalized due to the stress of the class falling apart. On her first day at work, when she goes to class 5-3, where she is in charge, students throw dodgeballs at her and call her an "old hag," but she bravely stands up to them. Among them is a female student, Kawai Hana, who stands out from the rest. She is quite a troublemaker, swinging a bat around. Kaori is surprised to learn that Hana is actually the daughter of her boarding house owner. Then Kaori learns from Hana that her classmate Yano Junichi is being bullied by a trio of Tsukamoto Ken, Fujii Masaya, and Onoda Taku. The next day, Kaori witnesses the bullying and tries to talk to the trio, but vice principal Nishikawa Kazuhisa and student guidance counselor Yoshimura Kikue stop her, saying, "There is no bullying in this school," which makes her angry. (Source: Japanese = hicbc.com || Translation = mario121 at MyDramaList)