Harry wasn't expecting to have a panic attack from DADA class. He also wasn't expecting to be shown the effect of the Killing Curse up close and personal, not when his own mother's green-tinged scream still rings in his ears every single night. In a burst of panic, The-Boy-Who-Lived runs to the only place - the only person - he feels safe with. His adopted father, his Da, Severus Snape. Who is also the only person he's not allowed to love, not if he wants to keep them both safe in the prologue of this inevitable Second Wizarding War. **Good & Dad!Snape AU - Not Snarry**All Rights Reserved