Back in hogwarts you and theo were in love and always together. As bad times came and you and theo wanted to change the sides and goes to the order side, the people from voldemorts kidnapped you. As you were in imprisonment and tortured, you begged one of the prisoners to erase your memory so deatheaters will never knew your secrets or order’s secrets or where theo was hiding. And one of them finally did it and they oblivated you so you could protect Theo. As Theo and other members of order came to free all of you, it was already too late. You had already no memory of him or your relationship. Now its after the war, voldemort won. You left as a prisoner and no memory of what happened. Theos family is in high ranks and graces of voldemort. Now Voldemorts people can have any prisoner they like. Theo chooses you before anyone can lay a finger on you. He makes promise to himself to make your memories come back as they are buried deep inside you. Now you are his slave in his house completely unaware that long time ago it was the place you two would spend time together.