Rei Nakano

A retired samurai must redeem himself for a crime that he committed earlier in his life.

When Mutta was 12-years-old and Hibito was 9-years-old the two brothers saw what they thought was an UFO flying towards the moon. They made a pact then to become astronauts and one day fly into space together. Fast forward to the year 2025. Older brother Mutta (Shun Oguri) works as for an automotive company and his younger brother Hibito works as an astronaut. Although Mutta failed to follow through on his childhood promise, after losing his job, he receives a phone call from Hibito which reignites his childhood dream of flying into outer space ...

Saburo is a high school student good in sports, but not very good with his studies. One day, Saburo travels back in time and arrives in the Sengoku period of 1549. There, Saburo meets Nobunaga Oda who looks and sounds just like Saburo. Nobunaga Oda is the son of a warlord and magistrate of the lower Owari Province. Nobunaga Oda though is physically weak and he asks Saburo to take his place. Then, Saburo as Nobunaga Oda attempts to unify the country of Japan.

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)