Agnyeoga Gildeulin Jimseung

Written as the villainess, Ilyana Glayne finds a noble boy named Magnus and tames him, causing him to lose his identity and become her submissive “beast.” While reading this story, a fan emails the author to inquire about the plot. When she wakes up the next morning, she finds she has become Ilyana herself! Disgusted by Ilyana’s actions, she vows to free Magnus from his beastly existence. But when Magnus steals a kiss from her, Ilyana realizes she may have changed the plot more than she wanted!
(Source: Tapas)