Emi Takei

With the space program attempting to travel to Mars, 21st century scientists were tasked with warming up the planet so that humans could survive on its surface. They came up with an efficient and cost effective plan of sending cockroaches and mold to the surface so that the mold would absorb the sunlight and the insect corpses would serve as a food source for the mold. It is now the year 2577 and the first manned ship to Mars has landed on the planet and the six crew members are ready for their mission. But what they find are giant mutated humanoid cockroaches with incredible physical strength. The crew members are easily wiped out, but not before sending a transmission back to Earth. Now, humanity will send elite warriors to exterminate the mutated bugs and claim back Mars.

Kenshin has settled into his new life with Kaoru and his other friends when he is approached with a request from the Meiji government. Makoto Shishio, a former assassin like Kenshin, was betrayed, set on fire and left for dead. He survived, and is now in Kyoto, plotting with his gathered warriors to overthrow the new government. Against Kaoru's wishes, Kenshin reluctantly agrees to go to Kyoto and help keep his country from falling back into civil war.

In 1879, Kenshin and his allies face their strongest enemy yet: his former brother-in-law Enishi Yukishiro and his minions, who've vowed their revenge.

The story of Kishi Keiichitaro, a dashingly handsome pathologist who is intensely eccentric and brutally honest, but also holds one of the most brilliant minds. A pathologist is a physician whose job is to determine a diagnosis of disease or cause of death based on an assortment of data, including a patient's tissue, bodily fluids, organ samples, blood, etc.

In 1868, after the Bakumatsu war ends, the ex-assassin Kenshin Himura traverses Japan with an inverted sword, to defend the needy without killing.

Shishio sets sail in his ironclad ship to bring down the government. In order to stop him, Kenshin trains with his old master to learn his final technique.