Bolt Crank is a mercenary. Rather than selling his services to whoever can pay, he accepts jobs for his own reasons, and insists on doing things his way. This isn’t the only thing that makes Bolt different, for he also has an appetite for eating metal, and can actually reform things he has eaten into the palm of his hand! Follow Bolt’s journey and watch while he takes on jobs, makes some money, and saves beautiful women in need.

Most of humanity has been wiped out by mysterious dark monsters known only as “Phantoms.” Four survivors, who may well be the last of the human race, have found one another and are sharing a quiet, peaceful existence. These survivors are a kind, dependable teenage boy called Masashi, two teenage girls, shyer Sanae and bolder Yaeko, and a little girl called Anna. They feel as though they’re just living in a perpetual “after school” state, waiting for the rest of the human race to come home. As they pass their days together, they begin to see some strange things and find that the monsters have not yet left the Earth. Will they discover what really happened to their planet?

In a world where women are no longer born, the state instigated a feminizing program. Among the candidates was the protagonist Masaomi’s friend Kenji.

This story takes place during the human war of resistance against the Arume.

Sachi lost her parents due to the sudden attack of an alien race 7 years ago called the Arume. While living in an orphanage of children who suffered the same fate, a girl with no memory, Ai, suddenly appeared. Who is this girl and what is she so afraid of?