Quick First Impressions:
Prisoners here want to get out of prison mainly because it's their order, and they have a bigger mission outside. Hopefully, their opponents (particularly the cops) won't be that easy (they managed to catch such high ranking criminals after all).

So far so good. I think it's very interesting. Hopefully the manga adaptation will focus more on their escape and their adventure out of prison... rather than on the... disturbing parts (I'm not a a yaoi fan, ya know)