The story just took a turn to it's downfall.. :/
(In my opinion at least...)
They are telling the story of Ciel, the one we've seen all this time, and his twin brother, te one which is the real Ciel. It means that our protagonist is not Ciel, but the other one who's always sick. They are also explaining what happened before the eccident (When their parents died and they were kidnapped) and they are going to show us how they ended apart after our protagonist makes the deal with sebastian.
Oh! Thank you so much, now it makes more sense!
You're so welcome honey :3
I'm so confused.. is there someone who can explain it for me? o: