As for the romance aspect, I think that will be an interesting challenge to incorporate. I expect it will devolve into lots of manipulation, backstabbing, and not knowing who to trust, which will make for great fun.
As for the concerns about staying original from Death Rule, I feel compelled to point out that Death Rule itself (from what I can tell) is heavily based on the H-game Secret Game - Killer Queen-, even to the point of using the same game mechanic. The fact that the setup is the same, however, doesn't mean the characters and plot can't diverge significantly. The "survival game" genre has actually gotten quite large, even though the basic premises are often similar, and I think there's still plenty of room to grow. But yeah, if you're interested in the genre and want to see how how your game fits in, here are some more examples:
http://tvtropes.org/pmwiki/pmwiki.php/Main/DeadlyGame
http://www.mangaupdates.com/series.html ... +Situation
Best of luck with everything!


