After finally defeating Voldemort, the wizards who had just emerged from the war were attacked by Muggles. Those Muggle weapons that could destroy the world destroyed the wizarding world that was already riddled with holes.
One day later, Draco, who was living a secluded life alone, met Harry, who was being hunted by Muggles...
Human beings become terrible when they are afraid, and killing labeled as righteous is even crazier than when it is evil. War creates madmen, and madmen enjoy war.
But luckily, when everything was destroyed, they found each other's embrace. When the last moment inevitably comes, knowing that there is still someone who needs to love me will not make my heart so miserable.