The Secret Bedroom of a Dejected Royal Daughter is a Manga/Manhwa/Manhua in english language, SUGGESTIVE series, english chapters have been translated and you can read them here. You are reading chapters on www.mgeko.cc fastest updating comic site. The Summary is

Princess Llewelyn, who was once an outstanding but now miserably abandoned. Her ugly curse is placed upon her, and no one protects her. It is the curse that makes her lustful for men. In order to stop her curse, Llewelyn opens her bedroom in the end... Four men are entangled with the abandoned princess. Will the truth of the curse be revealed? And who will be the man who will end up with her?