On that day, humanity was turned into “prey”―.
Gen is a high school student living on the island of Tsushima, a door to mainland Japan.
Along with his sickly sister, Misaki, and his heartwarming mother, Gen was living a peaceful life, all until an “asymmetrical monster” appears on the island.

All hell breaks loose on the island of Tsushima.

These monsters devour everything from plants to animals, to humans, and mutate together.
Will humanity stand a chance against these mutant creatures?
Is there any hope?

Kenichi Tachibana from Terra Formars illustrates yet another crazy Sci-Fi survival series!!!

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.

Note: Was nominated for the 6th Manga Taishou in 2013.