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.
"Maybe I feel peachy and I'm sitting on the floor of the dungeon because it's so comfortable, did you ever think of that? Of course not."
"No. This is a bad dungeon and it should feel bad. In fact probably it does. For everyone except me. I'm still shielding it out. Which also feels bad."
"Kinda leaning toward skipping that step, but like, thanks for asking, I appreciate you taking time out of your day except for how I have no idea what process generated that result."
"I fucking guess, but like, dungeons have this convenient trait where if you hang out in one long enough you die."
"They program the customer service robots really well these days, don't they. I bet you have a name and everything." But he'll get up and walk.
Yeah, now he's sitting outside the dungeon on the ground, looking around sadly at all the people who aren't real.
There's the localised flash of blue light, Haru feels a momentary ping in his backlash, and Jaeha homes in on him immediately. "Haru-ya," he breathes, kneeling down to wrap his arms around Haru.
"Don't let go of me please," he's clinging hard enough to hurt. "I'm sorry, I'm sorry don't be mad, I just, don't let go of me, I need you, please stay real -"
"I'm not mad, I'd never be mad, I'm not leaving you—" He's tapping at his commscreen behind Haru's back, he got confirmation that the suicide alert unlocked the system to allow teleportation back to their registered silo (Jaeha's house) without needing to request Haru's confirmation, and he says, gently, "We're teleporting home together, okay? I'm not leaving, I'm not letting go of you, I'll come with you and we'll stay together there, alright?"
"Oh my god I'm so stupid, I almost died, what the fuck, I'm supposed to be better at keeping track, don't you dare put me down."
"I'm not going to put you down." He presses the confirm button and then they're in his living room, Haru still in his arms. They don't need to move from there, any farther, but now Haru can break down or do whatever he wants without having to worry about witnesses. "You're not stupid, Haru-ya. You're a hero."