Pretty Elegant House Escape

In this game, you came with a very urgent matter to your friend. He bought a new house, and the first time you saw him. This is a very elegant building, which blends harmoniously into the street architecture. Your friend is in a hurry to work and asked him to wait inside the house. out of habit, he locked the front door and you are trapped. Now you must find the key to that door, that should be kept somewhere inside.