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)
By 2039, global warming had caused sea levels to rise and large amount of territory to be lost. As though in response, a mysterious group of warships clad in mist, “the Fleet of Mist,” appeared in every corner of the ocean, and began attacking human ships. In spite of humanity mustering all their strength, they were utterly defeated by the Mist's overwhelming force. All of humanity's trade routes were blockaded by the Fleet of Mist, their political economy was destroyed, and the human race was steadily beaten down. Seven years later, the Fleet of Mist's submarine I-401 appears before cadet Gunzo Chihaya. The humanoid life form that pilots the sub, who should be their enemy, is instead offering her services to mankind.
Edward and Alphonse Elric are two brothers gifted with the ability of alchemy, the science of taking one thing and changing it into another. However, alchemy works on the theory of Equivalent Exchange -- for something to be created, something else of equal value must be sacrificed. When their mother dies, Edward decides to do the unthinkable -- bringing her back to life by breaking one of Alchemy's biggest taboos and performing Human Alchemy. Thinking they have nothing more to lose, he and Alphonse make their attempt -- but something goes horribly wrong. In the process, Alphonse loses his body and Edward loses his leg. Ed manages to save Al by attaching his spirit to a suit of armor, but at the cost of his arm and leg.
Edward and Alphonse Elric's reckless disregard for alchemy's fundamental laws ripped half of Ed's limbs from his body and left Al's soul clinging to a cold suit of armor. To restore what was lost, the brothers scour a war-torn land for the Philosopher's Stone, a fabled relic which grants the ability to perform alchemy in impossible ways. The Elrics are not alone in their search; the corrupt State Military is also eager to harness the artifact's power. So too are the strange Homunculi and their shadowy creator. The mythical gem lures exotic alchemists from distant kingdoms, scarring some deeply enough to inspire murder. As the Elrics find their course altered by these enemies and allies, their purpose remains unchanged – and their bond unbreakable.