As Helen does work part time in Heaven's Sin, she is also a customer there as well. She would sometimes go there to try the food and even order some of the "special" services that they have. She was curious to see all the types of service they have and asked the cafe's owner Baal for some help deciding a new one she could try. Baal suggested to her to try a dream service as she can make any of her fantasies come true there. She takes her on that offer and then sleeps in the private room XD. Since Baal told her she can ask anything at dreams and Baal will make them come true, in her curiosity, she asked for something easy to see how exactly Baal's magic works like. She asked to be transported into a castle's rooms, something elegant for her taste. Of course for Baal, this wasn't something hard to do. And she just got a perfect idea of a place that might suit Helen's taste.

Helen belongs to me
Baal belongs to https://www.deviantart.com/master417
Commission by https://www.deviantart.com/inkicrow