Henkyo Mob Kizoku no Uchi ni Totsuidekita Akuyaku Reijo ga, Mechakucha Dekiru Yoi Yome nanda ga?

Synopsis:

Ragna, a reborn former Japanese citizen and the heir to a frontier aristocratic family, discovers that the world he currently inhabits is the backdrop for an otome game. His ambitions to live a carefree, adventurous life are thwarted when a battle claims his family and he is forced to assume responsibility for overseeing their property. An unexpected engagement to a noblewoman from a higher-ranking family complicates his already chaotic existence as he struggles with the unusual responsibilities of a lord. He is shocked to learn that the bride-to-be is Alicia, the "villainess" of the otome game's plot—a figure doomed to heartache, a demonic alliance, and final devastation. Ragna is now caught up in the wheels of fate, living his life with someone destined for catastrophe. Can he secure a calm life for himself and Alicia by rewriting the world's predestined outcomes? An unpredictable tale of survival and surprising relationships results from their entwined destinies.