What if Lily gave Severus a chance to make things right between them? What if they reconnected sometime in their seventh year at Hogwarts? Would their friendship turn into something more?
In which Severus has a mental breakdown. This is a personal head canon of mine, and details how I imagine Sev reacting to Lily's death. It isn't smut, but it is a darker fiction piece and contains what some might consider disturbing themes. While it isn't particularly graphic, it does contain a trigger warning above the author's note, just to remain on the safe side.