The Villainess Is Adored by the Prince of the Neighbor Kingdom

Lady Tiararose Lapis Clementille is a reincarnated character from an otome game she played in her former life. However, instead of being the heroine, she became the fiancée of the game's main love interest, Prince Hartknights Lapis-Lazuli Lactomuth, who is now her sworn enemy. Tiararose is wrongly accused and banished from the kingdom by Hartknights, but before her sentence can be carried out, she catches the eye of Aquasteed Marineforest, the prince of a neighboring kingdom, who proposes to marry her.