The story takes place shortly after Deku's return to U.A. High.
- Izuku Midoriya
Sorry to keep you waiting, Principal Nezu!
- Principal Nezu
Oh, thanks for coming.
- Kyoka Jiro
I heard this was an urgent mission. What happened?
- Principal Nezu
Civilians hiding out in the mountains just made a request to the police.
- Principal Nezu
There have been frequent vibrations on the mountain. Some say they feel like earthquakes.
- Katsuki Bakugo
So you think there maybe some weird escapees or villains hiding out?
- Principal Nezu
That may be it. No matter the reason, there is clearly a need for an investigation.
- Principal Nezu
The investigation of these strange sounds, and elimination of any villains that may be involved...
- Principal Nezu
We are providing assistance from U.A. for these objectives.
- Izuku Midoriya
I see. And we were selected for this investigation team?
- Kyoka Jiro
If Midoriya and Bakugo were selected, it must be pretty important...
- Kyoka Jiro
But it does feel like this is a small team. Is this everyone?
- Principal Nezu
No, we've put together a special team since this mission is deep in the mountains.
- Principal Nezu
Simply put, it is a joint team of Class 1-A and 1-B.
- Katsuki Bakugo
Class B?!
- Principal Nezu
Earphone Jack's search ability. Bakugo's explosive power. The flexibility of One For All.
- Principal Nezu
Plus, a student with a Quirk that can handle any physical obstacle without destroying it...
- Principal Nezu
And a student who can handle any situation if this investigation leads to multiple locations.
- Izuku Midoriya
That means...
- Neito Monoma
Ahahaha! As per your request, Monoma and Yanagi are here!
- Neito Monoma
That's right! Since Class A alone can't handle the job, we've been called upon!
- Reiko Yanagi
No, I wouldn't go that far...
- Katsuki Bakugo
Tch! Here comes a pain in the ass.
- Kyoka Jiro
It's true that Monoma's Quirk makes him as useful as several people...
- Kyoka Jiro
But with a personality like that... Will he really work with Bakugo?
- Izuku Midoriya
W-Well, I'm sure on a mission Kacchan will hold himself in check...
- Principal Nezu
The police will back you up, but you'll be in charge of the main investigation and resolution. Please do your best.
- Izuku Midoriya
Yes, sir!
- Katsuki Bakugo
You better back up all the big talk on the mission, 'kay?
- Neito Monoma
Naturally. I would also ask you not to cause any unnecessary trouble.
- Kyoka Jiro
Hmm... I can't hear any strange noises yet.
- Izuku Midoriya
My Danger Sense isn't picking anything up either.
- Reiko Yanagi
Midoriya and Jiro's search abilities are really top tier.
- Neito Monoma
Oh? What's this? Those two are working hard, but Bakugo isn't helping at all?
- Katsuki Bakugo
Get off my back! You aren't doing anything, either!
- Kyoka Jiro
Whoa, the road is blocked with dirt...
- Katsuki Bakugo
Did an earthquake cause a landslide? I'd normally just blast this all away...
- Katsuki Bakugo
I guess I shouldn't though.
- Neito Monoma
Yeah, the aftershock of the blast could cause more landslides.
- Izuku Midoriya
Should we take a detour then? Or remove this dirt from the road?
- Reiko Yanagi
Leave that to me.
- Kyoka Jiro
Whoa, the dirt suddenly moved to the sides!
- Izuku Midoriya
Poltergeist... Now that's a useful Quirk... So flexible and efficient, too.
- Reiko Yanagi
Thanks.
- Neito Monoma
Amazing, right? Unlike you lot, we don't just have over-the-top flashy Quirks!
- Izuku Midoriya
Haha... Huh? What's that? Why is there a cave here?
- Kyoka Jiro
It was covered by the dirt. Good thing we moved that.
- Katsuki Bakugo
It looks too polished to be natural. You can see someone also used torches here.
- Neito Monoma
It is covered in dirt and dust, though. Looks like it wasn't used for a long time.
- Neito Monoma
I checked with the police, but they didn't know of any civilians living up here.
- Reiko Yanagi
We need to investigate it then. It may give us a clue about the rumbling.
- Reiko Yanagi
Ugh... These walls are crumbling. They could all come down at the slightest shock...
- Kyoka Jiro
We need to move carefully. It will take time, though.
- Neito Monoma
Right. It is a lot to put on you, but please scout and keep lookout up front.
- Izuku Midoriya
Ah! Everyone, be careful! Something...
- Kyoka Jiro
What is that rumbling sound?! Is this the tremor or earthquake the Principal talked about?!
- Reiko Yanagi
It's so massive! If this continues...
- Kyoka Jiro
Ugh?! The ground is collapsing! This is bad, we're gonna fall!
- Izuku Midoriya
Float! Then... Blackwhip!
- Kyoka Jiro
Th-That was close... Thanks, Midoriya. You saved me.
- Katsuki Bakugo
Don't let your guard down! We're not outta the woods yet!
- Izuku Midoriya
Watch out for the falling rocks!
- Neito Monoma
No problem! We got this!
- Reiko Yanagi
If we both use Poltergeist, we can block all of them!
- Izuku Midoriya
Monoma, Yanagi. Thank you!
- Izuku Midoriya
Hmm, it seems like we fell deeper than I thought.
- Kyoka Jiro
We landed without any injuries, but... Where are we?
- Katsuki Bakugo
Who knows? All we know is that we fell underground.
- Izuku Midoriya
In any case, let's search ahead!