The dungeon is in Korea, but as an esper with a pretty specialised power niche Haru is used to occasionally having to go international for these dungeons, and the fact that he already speaks Korean is definitely a bonus. The espers he's going to be working with are all in Quasar Guild, which is the largest one in Korea and which has just recently acquired a very powerful teleportation esper, one whose power can be stored in batteries Quasar also happened to already have in its possession, so they're covering the teleportation cost for Haru to get there.
"How long until you leave?" he says, his voice growing smaller until it's just a whimper by the end of the sentence.
He curls up smaller. "I can't—live in the world where—you're staying—until—unless I know it's real."
...pet pet. "I am probably going to stay. It's - I'm horrified, obviously, but - you stopped. If we can figure out how you can stay stopped, if I can trust you - trust that even if I die or something you will still be safe - then I can stay."
Well if Haru dies or something Jaeha will also die so he will definitionally be safe he sees that today is a day for him to reach heights of mental illness heretofore unseen.
"Then I'll—believe it when we're there. And until then I—don't have any most urgent questions."
"So, I don't think I personally would have reacted to your power and your father the way you did but I think - kind of a lot of people would, it's understandable as - lapses go, and from there I guess it just got gradually pettier and more habitual, but you can break the habit, you've only poked me by mistake a very small number of times, and - you seem able to carry forward your plans from before you're backlashed into the period when you are, so that's not necessarily a huge relapse risk factor, does that sound right?"
"I—suppose?" He did break the habit with Haru, it's true, but also he'd just been not using his powers at all. ...he should say that with his mouth. "I don't know how much our experience so far generalises due to how I just haven't been using my powers at all full stop for long stretches of time. If I go into dungeons it'd be very easy to relapse into the habits."
"Dungeons are the biggest thing, since I use powers continuously inside them and then it's just a matter of not stopping. I—am not sure what other situations I'd be using my powers in."
"Oh. It's easier to not relapse then since I'm just using my power in short bursts and just to clear influences and shield people. The biggest relapse risk is using my passive powers at all."
"...maybe? I'd—probably feel sufficiently embarrassed of the possibility of fucking up."
"Short of experimentation, I'm not sure. I—the way I feel right now is that I'd rather cut my hands off than fuck this up. But I just spent eight years continually fucking it up. So I have a lot of—uncertainty—around what the actual triggers could be. I only have the one history of sliding into doing it and then sliding out of doing it, there aren't moving parts."
(Man, it's striking to him how the way he's taking sounds so weirdly nerdy to his ears and it's 100% because of who he wants to be for Haru and it makes him feel a little bit proud even though they're not actually going to figure this out and Haru will leave him forever.)
"You could go - not necessarily public public, but within-industry public, to have more - checks, than just me noticing if something's weird."
"With my powers or just my backlash? I—my powers are the kind of thing that gets people muttering about preemptively restraining and monitoring espers. —I'd still do it," because he'll do whatever Haru asks him to, "I'm just thinking through it."
"They are absolutely that," and if they had had a policy like that eight years ago, well... "This is presumably also a problem with anything along the lines of apologizing to anyone particularly egregiously affected."
"I think that'd be... I suppose it depends on what you mean. I'd naively only include Kang Jaehyuk in that category, just due to not really spending enough time with any other individual people to have done more than make a conversation go better. —not that that's fine, just, not 'particularly egregious', relatively."
"I didn't really use my powers on them. We met up for guiding, when I didn't care, and by the time I was sufficiently guided to care there wasn't anything more to be done to make those interactions have gone better, they were all already in long term memory."
"Do you... know, when you have somebody think that you said 'something cool', or whatever, what you're meant to have said, it didn't sound like you did but if you don't that'd get to be such a pile..."
"I usually don't just go with 'say something cool', I go with 'say something that communicates this but which comes off as cool'. But no, I don't get precise enough feedback to know exactly what it is that I was meant to have said. Occasionally this has involved me having to use my powers a bunch to cover myself while I try to infer what it is I'm saying in real time.
"That's when I care to. I could just let a conversation play out for them while I'm doing something else with my time."
"Right." Sigh. "...I want to figure this out but I don't know if it's realistic to do it tonight. Any chance you'll be able to sleep now?"
"...I don't know. I can try." Not on his own. "I want to flag that I think going within-industry public with at least my backlash is likely a good idea." And most importantly it's a concrete step that might get Haru to stay. He's mostly been running on that, on his words working towards the goal of getting Haru to stay.
He thinks that once he stops saying words he's going to break down again, though. He still hasn't actually looked up at Haru's face even once.