The Second Possibility of Harry Potter

. Puzzle. Rigorous reasoning. Caution. Realistic style. Respect the original work. Perspective of the person behind the scenes. No cheating, no frustration, no harem, no indifference, no Mary disease, no resentment. No forced intelligence. No forced physical protection. No forced plot needs. No word count. The protagonist basically does not participate in direct armed conflicts. No time travellers.