The Arrogant Princess and the Yandere Knight

You once found a poor puppy. He is loyal to you and you are satisfied. But the puppy had thoughts that he shouldn't have. So you killed him, hoping to avoid further trouble forever. But he still found it. He still loves you and is willing to be loyal to you as before. He knelt on one knee in front of your bruised body, I pray to you sincerely and with a low smile, Never abandon him again. (Ps: probably a twisted love story) Purpose: Just to satisfy your fantasy.