Could the twin be the one Ciel was playing chess with in his mind during the "Green Witch" Arch?
I thought it strange that he would be playing against a Ciel with two good eyes but I just sort of accepted it. However, it seems like this new Ciel is the one who our Ciel has been impersonating, giving the mind battle a whole new meaning. In the mind battle our Ciel is timid and unsure which maybe was who he was before all the shit with the Demon summoning went down but then decided the emulate new Ciel to take over the estate.
Idk, just thinking out loud.
I've always thought sport mangas were extremely boring with the only exception being Hikaro no Go, mostly thinking "I don't want to have the in-depth commentary on this sport. Give me drama!" However, there's a thrill in this manga that makes me eager to learn everything I can about Ballroom Dancing and I'm legitimately happy whenever they start explaining something.
Those cliffhangers though.... #－.－)
I always love sports manga and anime. Especially about Basketball.
Have you try read or watch 'Slam Dunk'? If not you should. It's a bit old, but really good.
Try
Chihayafuru
Haikyuu