The year is now 2041 AD. A new enemy called Zeravire suddenly appears in the solar system, destroying all military installations it comes across. However, a wealthy man named Klein Sandman is already aware of this planned invasion and had been secretly preparing his army for battle. His trump card is Gravion, a giant robot that utilizes gravity as its source of energy. Meanwhile a young man named Eiji secretly enters Sandman's base in search for his missing sister. It is there that he meets another young man by the name of Toga... These two must now fight together with four other individuals aboard the super robot, Gravion to fend off the Zeravire threat.

In the aftermath of a great and terrible war, Haruka finds herself the last surviving human on Earth. Though humanity may have been wiped out, she is not entirely alone. Advanced robots have survived the apocalypse, and Haruka lives with five who care for her: Spike, a boyish android who is very attached to her; Trigger, hot-tempered with a penchant for firearms; Cleric, the intelligent problem solver; Reeves, whose thoughtfulness overshadows his intimidating appearance; and Angela, a sword wielding recluse with an aversion towards humans. Residing in a high-rise building at the center of the city, Haruka lives a relatively peaceful life with her mechanical family. However, her life is far from a stable one. Not only is a lack of resources a concern, but violent, remnant robots from the war roam free, ready to destroy whomever they meet. Kurogane Communication follows Haruka as she tries to survive in an apocalyptic world while facing many dangers that will challenge her daily life.

The Kingdom of Clays faces a dire crisis: an assassination attempt has just been made on its own Princess Lynneburg, and its neighboring countries eye the aftermath like starving vultures, plotting the Kingdom's downfall. The ensuing conflict will shape the face of the continent for centuries to come...but Noor doesn't have a clue about any of that! Having freshly arrived at the royal capital after over a decade of rigorous, isolated training at his mountain home, he's dead set on achieving his childhood dream of becoming an adventurer, even if the only skills he possesses are useless ones. Sure, he can "Parry" thousands of swords in the span of a single breath, but everybody knows you need more than that if you want to be an adventurer! Our hero's road to making his dream come true will be long(?) and arduous(?)—but if there's one thing Noor's not afraid of, it's some good ol' fashioned hard work!

In a post-apocalyptic world, the treasure hunter Riot and his pretty sidekicks are searching for Eyes of Zalem, which they hope will guide them to Rido, the treasure of a long-lost Quall civilization. A limitless energy source, the Rido has the power to even restore life; but unfortunately for Riot, the evil Demsters are after it too.