Content Warnings for Penal Planet Bride:

• Dubcon touching 
• Spanking
• Gluing her shut
• Drug-induced estrus/heat
• Attempted SA by bad guys
• Explicit violence and gore
• Derogatory language directed at a sex worker

Though not a full-on dark romance, this book does contain some dark scenes and situations. It is a reverse harem romance with some sword-crossing. It is not a standalone novel, but the first part in an ongoing series,  and it ends with a soft cliffhanger. (Think HFN with many plot threads unresolved and more bonding to come in future books.)