The Antagonist's Pet(2019)

Blessed with the face of an angel, young Sasha Tartt knows a life-altering secret: in this romance novel where she’s just a side character, she’s the only one who knows the true ending! When the antagonist of the story takes a particular liking to her, she must make a decision: help the clever and beautiful Rebecca find a happy ending, or side with the sweet-natured protagonist to ensure her own survival? On top of that, Sasha has to juggle the affections of her bespectacled love interest and tame a dragon boy! Can Sasha learn new tricks to win the hearts of these main characters? Based on the hit novel.

(Source: Tappytoon)

Note: Chapter count includes a 13-chapter Epilogue