Soulmate Sebastian x reader

I don't own Black Butler :)) You are a half-angel, half-demon... For demons, their hearts don't beat until they pass their soulmate, they don't feel pleasure, they don't feel that many emotions. What happens when Sebastian comes across his soulmate...you. Will you accept or not? This is not modern^^

Your Life Is a Lie - Reader x Black Butler (Ciel, Alois, Seba

You, [Name] [Last Name], are the best young assassin in London. That's the reason you were chosen, well, blackmailed, to kill the Queen and her only son. But you nearly got caught, and you'll now have to disguise yourself as the queen. Your life depends on it.