My Ex-Boyfriend is the Villain

Turns out my ex-boyfriend is a possessive, scheming Archduke?! Archduke Kaian Black Blemer. The villain schemes to win the heroine's love. He approaches her gently, pressuring those around her to ask him for help. He indebted her family in the slums and made the Hemmington Count's business difficult, but when the heroine didn't ask him for help, the degree intensified. He threatens her friends (blackmail), Ruins the Count's family (fraud), Kills the heroine's family (incitement to murder), And when he still can't have the heroine, he kidnaps and imprisons her. That villain is my ex-boyfriend. "You said you wouldn't leave even if you knew who I was." "Ivy, I won't let you go even i...