Suicide Island (by the author of Holyland)
So far 4 chapters have been released.
Its quite an interesting seinen story about suiciders that survive the attempt. but since they dont want to live, they get thrown onto an deserted island.
there are no rules. they can kill themselves, they can kill others, they can try to survive, they can do whatever they want there.
gloomy athmosphere guaranteed.
check it out