Theme 1: Wishes
Watanuki just couldn't stop making wishes, and Doumeki had only ever made one. He had wished then to save Watanuki, to keep what he had not wished for, but had found. Kimihiro just didn't get it, couldn't understand it... the conviction Doumeki had, the absolute determination without doubts.
It was a state of mind Watanuki just couldn't seem to stumble upon, no matter where he looked or how hard he tried.
No one ever bothered to mention that state was only achievable by years of preparation... and the only thing that ever inspired it in Doumeki was Kimihiro in danger.