- Invaders of a Six Tatami Room!? - Author: Takehaya, Illustration: Poco - The Demon King and the Ring of the Undying Princess - Author: Yusura Citrus, Illustration: Shugasuku Bonus Bookmark 4-Piece Set Thank you for viewing. *Not sold separately. *Stored by a private individual. After obtaining, it has been stored in a dark place, but please understand that there may be initial scratches, etc.