How NOT to Summon a Demon Lord manga volume 17 features story by Yukiya Murasaki with art by Naoto Fukuda.

Diablo and company rush to the Greenwood Kingdom, where Shera's father, the king of the elves, has recently passed away. Once they arrive, Shera swiftly becomes the center of attention. Whoever marries her will end up as the next ruler of the kingdom! Unfortunately, Shera's mother has already decided on her preferred fiancé, and he's a frightening ogre of an elf. Just what fate is waiting for the princess of the elves...and is Diablo going to stand for it?!