That does sound like a pretty decent manga premise. Go for it!
Sorry; I don't draw (or write).
I guess that's a "no"? I'm a little surprised; it seemed pretty obvious once I started thinking about it. I think the "reformed succubus" threads on 4/tg/ were at least in related territory.
Some "sporty girls" apply to join Ernest Shackleton's Antarctic expedition. He accepts. Food runs low, and well...eat the *dogs*? What kind of monsters do they look like?