A young engineer, Tetsurou Okino, is transferred to a vermin extermination company called Hato Industries with the new robot Bullbuster that he developed himself. There, Hato Industries, a small company with little money, and its president Tajima are against a mysterious creature. There are fuel costs for robots, labor costs for pilots, and of course, wasting even a single bullet is unacceptable. Between their ideals of extermination and the reality of budgets, what does the future hold for Hato?

Seina's epic misadventures are moving from the depths of space to his home on Earth. While he's made just as many friends as he did enemies on his journey, it's time to go back to those he loves on his own planet. But he quickly learns that things aren't the same as they used to be.

The third of Tadao Nagahama's Romance Super Robot Trilogy. (#1: Chou Denji Robo Combattler V, #2: Chou Denji Machine Voltes V) After the destruction of their home world, the survivors of the planet Barm head toward Earth with the goal of negotiating the purchase of land to emigrate to. Unfortunately, during the negotiations, the Barmian's leader, Leon, is assassinated by his second in command, Olban, and the delegation from Earth is framed for the murder. In the ensuing chaos, Doctor Isamu Ryuuzaki of the Earth delegation is shot and killed. Shortly after the disastrous end of the talks, the Barmians (called "Valerians" in Starbirds) begin a campaign of terror against Earth, lead by Leon's son, Admiral Richter, who deploys a variety of "Mecha Soldiers" against the planet's defenses. The only thing standing between the Earthlings and annihilation is the transforming, karate-using super robot, Daimos, and its pilot, Kazuya Ryuuzaki. But that changes when he meets and falls in love with a mysterious girl named Erika, who turns out to be Richter's sister. Over the course of their struggles to reunite, Kazuya and Erika each learn that the other's people are not all evil... and that their own people are not all good.

Sun Goddess of the Solari, Leona came to Earth in 2014. The genetics of God hidden on Earth has started to awaken. The first few awakenings include the Power of the Galaxy and God of War. An invasion by the alien Tao Tie, just to entertain Death God Karthus, are on the way to Earth. The Angels, the Devils and God seminary groups that have been monitoring the genetics of God on Earth make their moves. The God Seminary assembled the scattered warriors across Earth who carry the genetics of God to form the Black Troops. Radiant Dawn, Leona, lead the team and train them combat techniques to fight against the invasion. Morgana, the Fallen Angel came to Earth to sow the seed of darkness and plot to destroy the Holy Kayle. Angel Yan was send to Earth, informing the invasion of Styx galaxy by Tao Tie. Earth has just become the battlefield for the war of different civilizations. As the disasters continue, the Black Troops will realize they are fighting more than what they are asked for.