Hamburr Undertale AU

Aaron Burr was a boy who lived in Snowdin, a place lonely and cold to him, his older sister, Sally, was his only comfort. She wasn't around all that often anymore while trying to become a part of the royal guard but he tried to be supportive anyway. Alone, he often left his make shift post his sister made for him to travel to the door to The Ruins. No one ever came there or from there so it was a place he felt safe, albeit often getting sick if he stayed out too long it was better to have a place to vent than stay held up in his home alone.
Alexander Hamilton was a boy who'd lived alone in The Ruins for quite a while now, avoiding the door his father left through and his mother told him to stop visiting before she passed when he had abandoned them. Tired of never ending grief and loneliness he let his curiosity get the best of him and one day went to the door. It was a decision he would never regret because he met someone oddly similar yet different from himself that actually wanted to talk to him.
It was a companionship they both needed and were happy to have, even if they were both hidden behind the door with their true identities a mystery to one another.