That Time I Got Reincarnated as a Slime, Volume 11

Rimuru’s taking a break from managing his kingdom of monsters by honoring the memory of his friend Shizu. Her former pupils will perish if he can’t find a way to rein in their unstable magical energy, and he might just have the answer. It will involve enlisting the help of powerful elemental spirits—but he’s about to find out that their fairy queen is a bit of a loose cannon…