My Next Life as a Villainess: All Routes Lead to Doom! (Manga) Vol. 6

Katarina has been kidnapped! And it seems like Selena--Jeord's brother's fiancee--is the culprit! As if that weren't bad enough, Jeord has received a letter demanding he renounce the throne! What are Selena's motives? And who is the true mastermind behind all of this? The answer may shock you!