It's not an actual house. It is the exit of the labyrinth that guards the passage to the Twin's place.
You see the Twins appear and very quickly drag Happyhorn and his bat monster minion into the haunted house.>>500105>>500107>>500109
You walk through the door and very quickly realize that this is the Nightmare Night festival. Despite the history of this city most of the people here are enjoying themselves bobbing for apples, launching pumpkins at walls and mouthy pegasi, playing games, and having a good time. People are dressed up as knights, spies, local celebrities, other races, monsters, skeletons, ghosts, and various other things.
The Twins appear in front of you, one wearing a large wig and fake mustache, and the other wearing a frilly pink dress and holding a sparkly wand. They open their mouths then vanish.>>500106
You walk through the door and appear in the room the other appeared in and see everything Andelia saw. The others are in the main room ahead of you,
but before you can do anything the twins, wearing rediculous costumes, appear in front of you. Without speaking a word they drag you through the door of the "haunted house" and take you past several twists and turns before you can do anything but blink. The one in the dress firmly presses you against the wall. They start to speak at the same time but break apart halfway through.
"Where did you get it?"