"Swear... that you will never fall in love with me, no matter what." 
A thousand years ago, a sad fate separated this pair of lovers. No matter how many times they reincarnated and reconnected, it always ended with his tragic death... And once again they are reincarnated, as a count’s daughter, Amelia, and a marquis’s son, William.
 
"I absolutely will not let him die this time!" 
Having decided this, Amelia swore that she 'won't love him anymore', and put on an act of being a wicked lady. However, puzzlingly, he is the one trying to get close to Amelia this time, and even sends her a marriage proposal...?! (Source: IMA, translated)