Simply beautiful. Such a perfect and natural career choice for Harry. Not even his choice, really, but it found him someway. Put his people saving thing in good use :D And I love to see Severus not irreparably bitter. The quiet but gentle relationship with his mother. That moment with Tobias was very poignant. Perfectly believable - as it is very common indeed, to fall in an imprinted pattern. While it's not an excuse, it helps Severus to understand. The art is very fitting too, quietly threatening... Very well done.