to the ends of the earth

"If it's your wish, my lord, I will follow you everywhere." It was a simple statement born out of the moment. That's all it was, just something a butler would say.
But then it became more. A desire to follow him to the ends of the earth. To spend the rest of the boy's pathetically short life by his side.
But no love is easy; Ciel's marriage to lady Elizabeth is fast approaching, and Sebastian ends up making decisions that may not be best for either of them.