That's the plot of this manga. The story it's a bit por because it only has this idea. It's also told a little piece of background for the main characters but not enough to make a good development of them. Although I should have expected it, since it's a short work.
The drawing work was the best charateristic of this manga. Nice scenes, good action and scary places. Sure it was a good job.
I really enjoyed this story. Although it wasn't a masterpiece and it didn't last long, it was such a good story to spend my time on.
I hope the sequel keeps the good points of this work and then improve some things, for instance some scenes were confusing as they didn't have enough panels.
