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.
Arghhhh he wants to undo and redo it better and he can't argh.
Anyway what did he do when he was a teenager. Had a lot of inadvisable sex. Pissed Kang Jaehyuk off. Was a dick to his classmates.
He doesn't remember!
Haru does not seem lastingly affected by the adorableness situation. "I can cook," he mentions. "Probably not this week because while the dungeons can't find my ass to kick it the schedule's going to do its best but in general. I'm mostly good at Western food, though, Ren and I took turns and she was the one who always wanted to do Japanese food as part of the underlying characteristics that made her move to Tokyo in the first place. And at Charlie's he's a terrible cook so I do all of it while I'm at his place but his palate is Westernized as all get out so it's all stuff with bread and cheese and bacon and, if I'm very convincing, a vegetable."
"Just the one? Gotta pick it carefully, then, wouldn't want us regretting our choice."
"Usually just the one if you don't count potatoes! He will tolerate roasted broccoli with enough butter and garlic on it, I think that's my greatest hit in the vegetables department with Charlie."
"Alas, no, he has the spice tolerance of a... I set that sentence up to require a simile and I don't have one. He does not have a significant spice tolerance."
"It doesn't need to be spicy, so long as he doesn't inherently object to the underlying flavour 'butter and garlic' isn't not a kind of seasoning," however much that sentence pains him. Well, the garlic's alright.
"I haven't tried him on really mild kimchi. It's harder to get, there, and he lives in a teeny nowhere town where I'd actually be a little surprised to find one kind of kimchi in the store, though maybe I'm selling the place short."
No, see, Haru, this was Jaeha offering to cook for your dad so as to make your dad like him.
...ah, fuck his life, honestly. He'll just say it.
"I was subtly indicating that I could cook for your family should the opportunity ever present itself." Haru knows he likes him anyway, what's he go to lose except for everything.
"Well, you'd have to go to Canada, he can be budged but it takes something big and I'm not going to awaken again."
"As an honorary esper with access to the teleport network that is an acceptable cost to me."
"Well I'm not currently being much of one, am I?" ...wait. "—sorry, that came off as more bitter than I meant it, I was just making light of it."
"I'm used to 'honorary' meaning more like, you don't have a doctoral degree, but this college thinks you're very cool, so they will award you one. You're a genuine esper who happens to be on vacation."
"...could be I've always been mistaken about what that word means..." He pauses his cooking to open his commscreen and Google it. "Oh, could be a regional thing, Google says Brits use it to talk about being an unpaid holder of an office and that is what I thought at the time."
"I suppose you're right. I'm almost done, do you want to—never mind, actually." He shouldn't ask his backlashed partner to go set the table on his own.
"Well, I could, but I'd have to let go of you, which as you apparently surmised is not very appealing."
"It's because I like you," which is still not something he's ready to say in either Korean or Japanese but this is fine. It's fine.
Jaeha kisses him for that, but then he can get on the setting up the table and serving the food.