Futsutsuka na Akujo dewa Gozaimasu ga: Suuguu Chouso Torikae Den

In the court of the Kingdom of Ei, Reirin is everything a maiden is expected to be: brilliant, beautiful, refined, and painfully frail. Consumed by jealousy, Keigetsu uses magic to swap their bodies in hopes of stealing Reirin's life and status. The scheme goes wrong in an unexpected way.

Instead of despairing inside Keigetsu's healthy body, Reirin is delighted to finally eat, move, and live without constant illness, even while facing accusations that could lead to execution. As she fights to survive the palace, dangers far deeper than one girl's jealousy begin to surface, forcing Reirin to use both her sharp mind and her newfound strength to protect herself and those around her.