Daranal su Eopge Mandeureo

Freedom is all our heroine wants, but that isn't what she finds when she is summoned across worlds into the body of Lady Beatrice and is newly named "Regria." As a "divine being" who can purify the minds of "divine knights," Regria is expected to wed the Belligram Empire's Prince Rahich, who only sees her as a tool that will keep him from going insane. But when Beatrice's original soul finds Regria in a moment of danger, she tells her how she can be free: by untangling Rahich's twisted soul and making him kneel at her feet.
(Source: Tappytoon)