Brotherhood.

Their father was an abusive man who went out each night to get drunk, and their mother was an angel sent directly from Heaven to protect them. It all changed the moment their youngest brother was brought into the world, removing their mother completely from it.
You would think, life couldn't get any worse.. I mean, you already have five younger brothers who most of the time don't get along with each other, and a father who will beat you just for breathing.
Well... we thought it couldn't get much worse, until our youngest pulled a knife on our father to protect one of us..
We're six brothers, who never get along, but will protect each other no matter the consequences.
Even when our old man shows up at the front door after being released from prison.