Thanks to Illuminater for inspiring me with quotes.
"A photo says, You were happy, and I wanted to catch that. A photo says, You were so important to me that I put down everything else to come watch."
Watanuki first spotted the photo sitting on Doumeki's desk in his room all by itself. He'd been waiting for Doumeki to return from going to see what his mother wanted.
In the photo he was smiling, though not in the direction of the person taking the picture.
He didn't know why Doumeki had it.
But for some reason, it made him feel happy that he did.
Errr... Vague and confusing? It probaly is. Oh well....