[It's honestly kind of nice to hear a completely logical rebuttal, even though Yoosung basically had the same conclusion he came to. To his eyes, Jumin has everything he wants, so if he got a wish... well, maybe there isn't nothing. Even God's wishes are being granted here, so he could wish to make his cat immortal or something. But he doesn't voice that (probably for the best, don't encourage Ash) since he's asking him about his own wish now.]

I really am looking for a girlfriend! That's the first thing on my mind!

But if I got my wish... [he sinks his body a little deeper into the water and the jet.] Uh, the details aren't great for a hot tub mood, but basically I'm looking for the truth. I'm still thinking about the exact thing I'd wish for...

[like, is it enough just to wish to know? What if he also needs justice once he does?]

... but it definitely has to help with that somehow.