Yuia is a princess imprisoned in her own castle.

But her father is the Great King Tansei! Slayer of the Old Evil, ender of the Decade War, protector of all of Aitosukawa! How can this be? She must be evil! Lie. A witch! False. She must have forced his hand! Incorrect. It's well deserved! Untrue. It's for the safety of the people! She used to think so too.

Locked in a small room for years with dead rats and books as companions, Yuia believed she was cursed to have death and chains hold her in a forever embrace. However, after her rushed engagement and wedding to a devastating handsome king, Yuia learns that they were better and safer company.