Snape's POV of "Controlled Emotions" although you can read this without reading Controlled Emotions which is from Harrys point of view. HP/SS.
Dumbledore requests Snape to recommence Harry's Occlumency Lessons. Snape decides it is time for a different approach. A look at human emotion. Set in Harry's 7th year therefore not canon compliant Dumbledore not dead etc HP/SS rated M for a reason HP/SS
Did the Killing Curse do more than leave a scar and create the 7th Horcrux? Is there more to the hatred the two men feel for each other? Can they learn to deal with what they find out, before its too late? HP/SS see chapter warnings.