Reciprocation. [he seems to digest the word for a moment.] But, I do not have a particular desire for it. I am happy as it is, just feeling this way. If I can be here for him when he needs me, that alone brings me a kind of joy I never knew.

[something about the way Kaworu said that, though, suggests some kind of conflict is present - it sounded like he was trying to reason through something.

Kaworu's eyes are drawn to Nageki's hand, and he realizes he may be saying too much. He knows that he's delicate, similar to how Shinji is.]

...Do you know how to play?