Episode 231- The bath had a screen so Eugene didn't see anything she shouldn't see.
There was more he didn't tell Eugene. Like how he went on a killing spree, and killed everyone from his grandmother's side the day prior. No one noticed because the people who he had killed were ordered to come to the estate secretly by his grandmother. It was amusing because of his grandmother's nervous expression when no one arrived.
No one could see Louis's expression at the moment because it was dark. He turned around and walked over to the fireplace to add more wood in it, and it was only then that his blank expression became visible.
Though it was summer, the night in Raden is cold, so he was advised by the physician to keep Eugene cozy and comfortable. The heat from the fireplace spread around the room, warming both himself and the injured girl. It was a comfortable and relaxing atmosphere and this atmosphere carried all the way to the next morning.