help with name D:

I read this manga a few weeks ago but i cant remember the name
Is about a team of guys like free agents who do jobs for money, one of the guys was like a soldier when he was younger, and his team leader fucks with him, at the start is just like fuck-buddies, but later the two start to feel something romantic, the team leader dies saving his subordinate (the one he fucks with) in the middle of a mision saving a group of orphans guys, some of those guys form with him the independient team later