What I remember:
Fury is sending Steve on dangerous missions to route out hydra, Steve doesn't know this is the goal, Bucky works it out tells Fury off and insists on going with Steve on his missions. (Bucky shoots the guy Steves meeting in order to pull focus onto him and off Steve).
On mission Bucky wears a scarf to cover his face, during a fight he kills a girls father, he take of his scarf and gives it to her, tells her to cover her face when she fights so when she takes it off she can still go home.
Toothbrush is a luxury not to be used on mission?
It's a slow burn Stucky fic.
Steve wants them to avoid killing when possible and aim for turning the Hydra they can to there side, he changes his mind after a guy tries to blow them up and Bucky protects Steve by diving out of the van with the bad guy, scaring Steve.
Story Found link in comments.