The Tyrant's Tranquilizer(2021)

Amelie Bourbon is a witch, destined to die at the hands of her lover, the ruthless tyrant Serwin Hennessia. So when ordinary office worker Lee Suyeon is reborn as Amelie, she vows to change the ill-fated story. The problem is the “calamity” sealed inside Serwin’s body, which threatens to ruin him and the entire world, can only be calmed when he is near Amelie. As she grows closer to Serwin, Amelie must hone her magic to subdue his violent impulses, but can she defeat calamity once and for all?

(Source: Tapas)