Kabaneri of the Iron Fortress - S01

The world is in the middle of the industrial revolution when horrific creatures emerge from a mysterious virus, tearing through human flesh to satisfy their endless hunger. The only way to kill these beings, known as "Kabane," is to destroy their steel-coated hearts. But if one of these monsters bites you, you are doomed to a fate worse than death, because the fallen rise again to join the ranks of the undead. Only the most fortified civilizations have survived this chaos, as is the case with the island of Hinomoto, where mankind has built a massive wall to protect itself from the endless hordes of Kabane. The only way into these giant fortresses is by heavily armored trains, which are built and serviced by young men like Ikoma. After creating a deadly weapon that he believes will easily pierce the hearts of Kabane, Ikoma eagerly waits for the day when he can fight using his new invention. What he does not know, however, is that his chance will come much sooner than he expects...