Dokuro wa Yamiyo ni Ugokidasu

An old man who has lived a solitary life finds his quiet existence unexpectedly disrupted by the arrival of new neighbors. Their warmth and genuine kindness begin to crack through the walls he's built around his heart, offering him a glimpse of the human connection he's been missing for so long. But this fragile new beginning is shattered when a terrible tragedy strikes, leaving the old man at a crossroads between despair and something far darker. What follows is a harrowing journey into the depths of human nature, where the line between justice and vengeance blurs in ways that will challenge everything he thought he knew about himself.