Haga Ineko stopped being a school teacher for she was about to get married. When she is suddenly dumped by her to-be husband, she loses her way, and starts drinking. One day, an old friend approaches with a job offer. She would be a substitute teacher in a class on which several teachers gave up without an apparent reason. She reluctantly takes the job only to discover that there are several brutal bullying cases inside the class. Even she eventually starts being anonymously threatened due to her opposing posture against such cases. She now has to identify and reprimand them while at the same time protecting weaker students. The word "Hagane" on the title is a nickname which comes from Haga (her surname) and Ne (from Ineko, her name), but is actually a pun with the actual word hagane (which means steel, denoting how she must be in order to resist as a teacher). (d-addicts.com)

Michiko Kichise
Juna Aoki

Kasumi Arimura
Mana Nishibori
Roi Hayashi

Nanami Hinata
Atsuki Ishii

Jun Kaname

Yoshiaki Miyagi
Matsuri Miyatake
Haga Ineko (Michiko Kichise) passed her teacher's exam with the encouragement of the kids in her 4-3 class. Haga is 36-years-old wants to say that she is still single, but her boyfriend and ex-assistant home room teacher Wataru Shioda (Jun Kaname) proposes. While Haga looks at the engagement ring given to her by Wataru she feels happiness.
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