Doku wo Kurawaba Sara Made毒を喰らわば皿まで; If You Devour Poison

The Kingdom of Parsemis is a land blessed by an ancient dragon. In this kingdom, the evil Prime Minister Anderheim remembers his past life while his daughter's marriage engagement to the crown prince is being broken. At the same time, he realizes that this world is that of an otome game that he was playing in his past life. In the game, his daughter is the evil fiance of the crown prince and he is destined to be executed alongside her. Unable to accept this, Anderheim devises a plan to trap the game's conquest targets, who side with the crown prince. Including seducing the honorable leader of the knight's order, who was also his rival...