House of Riddles is a Manga/Manhwa/Manhua in english language, Manhua series, english chapters have been translated and you can read them here. You are reading chapters on www.mgeko.nl fastest updating comic site. The Summary is

The brutal and bizarre murder raises the curiosity of the famous gentleman detective Lucien, but the crime scene is destroyed by a fire. And the last person to arrive at the scene was Scarlett Atissian, the producer of the house who learned from the crime scene. To find out the truth of the case, Lucien had to" bully" the strange lady to cooperate with his investigation. He didn't know Scarlett had so many bloody secrets...