2 Works in HPFandom
Harry understood the dangers to himself when he broke magical law to save Snape's life, but he didn't realize that Snape would end up returning the favour that same night with unexpected consequences. Now Snape wants compensation for his "injuries" and the wave of popularity he has suffered as a result. Harry has to decide if he's willing to risk his heart as readily as he risked his life.
Snape catches Karkaroff doing something he shouldn't; Karkaroff persuades Snape not to tell anyone.