Potter's Freedom (слэш)

Beginning: Four weeks after the Battle of Hogwarts. Severus Snape sits in Azkaban, expecting to be condemned without a trial — yet for some reason Potter is sitting outside his cell, utterly convinced that he can change things. Can he? And if so, what will Severus’ life look like afterward?
Warning: Some main characters who survived / died in the original canon do not share the same fate in this story.
After the main story, several connected one-shots follow, so the final chapter count is unknown. The OS continue directly from the end of this story.