The monsters aren't totally incorporeal but they're not totally corporeal either. Since they can go into buildings it would not be feasible to check everywhere they could be directly but they remain in contact with Won Seonwoo and he can use his power to point them in the right direction.

And a little bit over an hour later Lee Tae-gun appears back at the main camp.

"Good evening."

They've done as much recon as they're going to so they're all back, too.

"Good evening, Lee Tae-gun-nim. I am team leader Choi Hyun-min, B-rank combat esper, and these are Won Seonwoo, B-rank psychic and defensive esper, and Goh Su-ah, B-rank sensor esper."

It's always sooooo awwwwkwaaaaard talking to people from other guilds who insist on telling each other their ranks when introducing like that.

"It's a pleasure to meet you," he says, but his eyes are looking for—

"Hey, Tae-gun."

Aaaaaaah he's so hot this is unreal and Tae-gun is going into a dungeon with him aaaaaaah.

"Hi, hyu- Kang Jaeha-shi."

Oh they fuckin' fuckin'.

Yes, they are. 

—wait. Ah, shit, he's been using his power nonstop and he's reading everyone's emotions. He should... stop...

"Don't react," he warns Tae-gun, and shields him.

He doesn't, very much, except for a narrowing of his eyes and a reassessment.

"Brief me?"

The team leader goes into the details, including the powers of all involved and what they found inside.

...yeah that seems pretty straightforward, actually.

Maybe if you're Lee fucking Tae-gun.

Envy doesn't become you, Won Seonwoo-shi. ...ah, and jealousy, too? Is that what Won Seonwoo had been feeling earlier, he was wistful about not being able to be Jaeha's partner because they're not compatible? That's kind of adorable.

Stop. He said he was going to stop. He no longer needs to keep an eye on everyone, not while they're all still shielded and can deal with the threats better than he can.

Argh.

He stops.

So the plan is going to be to go inside, Tae-gun will deal with threats while Goh Su-ah maps the whole dungeon, and they can rescue anyone they need to. Once they're done with that, they'll go back out and take out the monsters that are still outside, and once those are taken care of, they'll destroy the dungeon core.

"Won Seonwoo-shi, is it still a bad idea to reflect the monsters' powers against them with Tae-gun on the team?"

He frowns. "No."

...he's starting to realise he's actually a lot worse at reading people's body language and tone of voice than he thought he was. He's always been filtering it through his powers, it seems, and using them as a crutch. 

He needs to learn it the hard way.

Well, Tae-gun is happy to go along with that plan. 

Ahhhhh he's going into a dungeon with his boyfrienddddd he hopes he doesn't disappoint he is being silly. He has done dungeons with Jaeha before. There is no reason why this one should be different except there IS because they are IN LOVE he is being exceptionally silly.

Tae-gun, on the other hand, continues to be extremely easy to read even when he's trying to mask in public. That's probably because he's in love.

But once he's inside it's time to put his game face on and get busy. He wouldn't really be necessary for something like this, but the dungeon is definitely going to get classified as A-rank, and two S-ranks (Jaeha in fact if not on paper) are more than enough to make this a walk in the park.

...okay yeah he just can't compete with that.

No kidding.

There are kidnapping victims in the dungeons, it turns out, but they're none of them trapped, and the dungeon was just relying on the hallucinations to keep them there. Once Goh Su-ah finds them Jaeha can free them from the mental effects.

And it turns out that reflecting the monsters' attacks back on them causes them to lash out very violently, but it does take them out of commission easily.