Take's new tankoubon, 異種奇譚. There's no hardcore guro but this story involves a bunch of innocent girls being used to harvest a special species of tree. The leftover girls who don't react to the seeds are raped and murdered over 30 days while they wait for them to grow. They use the 4 girls who manage to live until the last day to test the seeds and then leave them to die on the corpse pile of the other girls. Surprisingly messed up for a normal serialized adult comic.