Sentiment and Espionage, and All That Lies Between (слэш)

In the aftermath of the Wizarding War, life is bleak for the survivors. With so many of their own gone, there is little left to do but rebuild and grieve. But when Severus Snape learns that Lily’s son has been placed into the neglectful hands of the Dursleys, he makes the decision to take Harry away from them. His plan goes perfectly, until Remus Lupin, who barely survived the war or the death of his friends himself, confronts him. Neither willing to return Harry to Petunia, together the former Death Eater and the werewolf with PTSD decide to try to raise Harry. With Death Eaters, The Ministry, the Order of the Phoenix, and Dumbledore himself hot on their heels.
Warning: possible triggers for suicide, depression, and PTSD