The fact that that phrasing is where his brain went to is interesting, though. "Bring my partner joy." Would going to a fancy restaurant bring Jaeha joy? He said that his taste buds have been deadened for years and it's not the taste of the fancy food that he wants, and after stopping to think about it for a little while he agrees with that, it really isn't the taste of the food. But it's also not just the narrative, like he told Haru yesterday, not by itself. There's something more.
He actually has some trouble pinning it down, and it's interesting (and unpleasant) that the emotion he feels while he tries that is embarrassment. What's there to be embarrassed by? He wants to go to a fancy restaurant with Haru for an embarrassing reason, what is it?
Actually... Didn't he say he wanted to do a little bit of a production? Why did "a little bit of a production" conjure that image he described to Haru, of picking him up at his door, slightly overdressed? He referred jokingly to "the gay teenage romantic I never was but who still lives in me", but was it actually a joke or did he just put it that way self-deprecatingly in order to protect himself and his feelings in case he didn't get what he wanted? Wow, uh, when he puts it like that the answer is really obvious, isn't it. He cares a lot more about that than he thought he did. He wants it. He actually really, really wants it. He wants to, to...
He wants to pick Haru up at his mum's place, be really polite and charming to Ren and tell her that he'll bring Haru back by midnight and take good care of him. He wants to be driving a car slightly nervously, stealing glances at Haru when he thinks Haru won't notice, except of course Haru will notice and he knows that Haru will notice, but they'll pretend he doesn't while his hand is conveniently located for Jaeha to hold it if he wanted to, and after a little bit of this he'll wipe his hand on his trousers because of how nervous he is and he'll tentatively take Haru's hand and Haru will jump a little bit because he got distracted right that moment which will make Jaeha panic but before Jaeha can properly pull his hand away Haru will grab it firmly and keep hold of it, looking out the window. Jaeha won't be able to hide his goofy grin, even if they're holding hands for only a few seconds because he has to drive, and Haru will think he's really cute, and they'll talk about nothing at all until Jaeha gets them where he got a reservation for. He'll be trying so hard to impress his date, and it's completely unnecessary because Haru already likes him, but Haru will indulge in it because Jaeha looks really cute when he's flustered and trying too hard, and Haru doesn't really care about the restaurant but he does care that Jaeha was so thoughtful and thorough and is trying so so so hard to get it right. They'll talk about all sorts of things, because they just click together, and Jaeha will get distracted from feeling nervous, and on their way back he will be a lot more confident in holding Haru's hand, and he'll walk Haru to his door and look around a bit nervously before stealing a kiss from him on the porch and fleeing into the night.