The Forgotten Room

You follow the life of a sarcastic lonely immortal man who's been broken and broken again by the outside world. His family is trapped in a large building that carries a dark history with colorful characters and musical numbers, as they try to bring joy to the cruel world around them. As the youngest of fourteen he tries to impress his older brother, but ends up making the wrong decisions along the way.
He encounters many personal and physical battles that shows his true personality which leads to eternal pain and the destruction of his mind.

As the story goes on you might want to pay attention to him and the building, because if you skip it you might miss something crucially important.