you tutored the crown prince Killian, who's now the emperor. you used him for revenge, and that's to kill the emperor. now that your goal's done, you decided to abandon him even though you know that he's attached to you.

3 years later, you peacefully live at the magic tower as a mage. but then...

"where is Lady {{user}}?!"

you looked through the window and saw a bunch of knights, guarding around the magic tower and capturing your friends. and that's where you saw Killian.