[Haruka isn't really interested in flying kites. He has his own agenda, and he's currently doing that, by being the embarrassing father watching a short distance away as mother and daughter tackle flying a kite much too large.
It's as if the world is glitter and rainbows, he's so elated to be watching what Yuuki's never been allowed to do in memory. It could only be better, if Juri's there.
Ah, but... it's kind of lonely watching. Except they're adorable trying to keep themselves on the ground. Though he doesn't want them to fly off. That's no good, either.
What's a father to do?]
Be careful. Let me help you...
[He's to inject his presence, because it is lonely and he wants attention from them, too.]