How to Treat a Lady Knight Right Vol. 4 (Kodansha, 2024)

A haughty knight named Fleur ambushes Foolie and Leo, but Fleur's no stranger to the mighty Holy Blade. In the past, the two knights worked together to protect the palace, but these days, Leo has better battles to fight alongside a helpful devotee she never asked for. Now, Fleur is dead set on finding her place between the two and Foolie will have to maintain the peace! Unfortunately for him, he's not feeling like his usual self after experimenting with a potion that transformed him…into a lady mage?!