After Transmigrating into a Book, I Was Marked by the Crazy Beautiful Villain [GL]

Su Mi transmigrates into a school ABO novel, becoming a vain and opportunistic sidekick to the villain, ultimately facing a tragic end. The beautiful and melancholic villain, an SS-level Alpha and the young yet unmatched head of the Shen family, is infatuated with the delicate heroine due to a certain “heart disease.” As the romance between the male and female leads progresses, the villain is supposed to exit the story gracefully— However, for some reason, the villain’s mental state collapses on the spot, dragging the leads and the entire small world into destruction. System: The host’s task is to reduce the villain’s darkening value. If the task fails, you will perish along with the sma...