Only the Brave

Regulus Black is angry. He wants revenge. He wants to watch the world burn for all it's done to him. He also wants to make out with James Potter, but that's a secret he'll take to the grave. Vengeance is more important than… whatever it is that chokes him when he lays eyes on Potter.
James Potter is confused, because Regulus Black is, all of a sudden, hot. And it's unfair because Sirius is going to kill him if he doesn't get his impulse control in line.
OR
A fic about two idiots falling in love (x2 because there's wolfstar, too) during a war, and the sacrifices they'll have to make to survive it.