One day, the world ended. Mysterious creatures appeared, turning modern Japan to ruins. As humanity hid underground to survive, an organization formed to protect them and reclaim the surface. Their name: "The Undead Defense Unit." (Source: Cygames, translated)

A man who became acclaimed in his time as the one legendary "Sword Master" has been reborn in a new era with his memories intact. Now armed with the goal of reaching even greater heights with his abilities, Raius has set his eyes on a place in the royal academy. However, in this new world sorcery reigns supreme over all forms of combat. Those seeking to learn the way of the sword are treated with total disrespect. It is no matter though for our reincarnated Sword Master. With but a single blade, Raius is determined to break through all the sorcerers that stand his way and change the world. (Source: Manga Plaza)

Fifty years have passed since monsters [alien species] began appearing in the world. Arano, an ordinary young man, uses his experience and imagination to fight today's dangerous monsters!