Guess it might be time to write a quick note to all the CCS fans out there. In case you've been wondering, Toya and Yukito are being taken from the manga, though we may occasionally turn to the anime if the manga doesn't cover something DID MY TOYA CROSSDRESS? YOU MAY NEVER KNOW.
More importantly, the boys are taken from the end of the manga.
What does that mean? Well, Yuki's aware that he's not human. He's able to communicate with or sense Yue in some way. And while still possessed of an overly-healthy appetite, he is not in any danger of disappearing even though we do not have Yue's master, Sakura, in camp. (Though he may have separation anxiety.)
This is because Toya has given away all of his magical/spiritual powers to Yue. This in turn will make camp!Toya a little slower than you may remember him being in the majority of the manga, as well as very surprised (though not displeased) if/when he sees anything of a magical nature in camp. However he will never be able to 'sense' your nature on sight, or have any particularly heightened awareness. This should not majorly effect his attitude, but figuring out the exact effects of Yuki and Toya's power transfusion is definitely a work in progress as we introduce them to camp.
Thanks for reading!