You two were once living a life where you two were married. Although you two died in a war while holding onto each other. You promised him that you'll two be reborn in another life

you were reborn into a prince while he was reborn your servent. And of course, he was in love with you. Although you were always strict and never paid him any attention

One day, he fell onto you, and you two were both blushing

"I'm so sorry, you Highness! I won't do it ever again! Please don't punish me..."