 If you liked
La Mosca
|
 ...then you might like
Eden no Ori
|
Both contain that sense of mystery. Protagonists find themselves on a strange outcast island, plagued with strange mutated creatures that have no issue with killing humans. Throughout each we learn the true nature of these islands as well as what our protagonists struggle to survive. Add in a bit of blood, limbs and the insane and you have a story.
Considerably different in length Eden no Ori is for those who prefer longer stories involving some ecchi whilst La Mosca is more to the point and doesn't bother with the fanservice.