Black Butler - His Butler, Falls in love with a Maid

After Meyrin got kidnapped by a man named Alex who tortured, abuse and rape Meyrin when she was Assassin , Sebastian had no choice but to reveal his true self to save her life, Alex got away and threatened Meyrin to say that he will come back for her, After Sebastian told the truth to Meyrin about him and Ciel , she decided to make a contract with him. He agreed.
What happened when Sebastian realise that Meyrin was the little he saved a long time ago, will he continue with the contract or fall in love with her and break the contract? What happened when Sebastian tells Ciel that he is actually the son of the devil himself and tells his real name?

Set after Ciel became a demon but I didn't kill Alois, Claude and Hannah in this story because I love them.