Henkyou Mob Kizoku no Uchi ni Totsui de Kita Akuyaku Reijou ga, Mechakucha Dekiru Ii Yome nandaga?

Laguna, a noble heir from a borderland family, is a reincarnated person who recognizes this world as an otome game he once played. He wishes for a relaxed life but must now manage his territory, which proves difficult. A marriage is arranged with Alicia, a noblewoman from a prestigious family. Alicia is known as the "villainess" in the game, but Laguna realizes this label is inaccurate. As their relationship grows, Alicia faces an assassination attempt. Laguna must protect her and prevent her from meeting the fate outlined in the game.