This manga's premise is quite interesting as the children are left to fend for themselves in an island wrecked by a tsuanami and virus. However, I found the anatagonists (in this case other traumatized children and adults) quite lacking. It felt like the author added these factors to make the situation more tense, when it's quite tense already even without flat antagonists that serve only to stir shit up every once in a while.
I would've also liked to see the group dynamic of the child survivors evolve, rather than focus on lame "villains".
All in all a manga with a lot of missed potential but worth a shot if you enjoy survival type stories.