After Senku & the others entered the bunker when Kohaku informed them that there's someone frozen in the cryo-pod, we see everyone standing in front of it with mixed reactions, such as Gen being shocked, Senku smirking in being impressed, Kaseki staring at the cryo-pod in awe and Magma, well he was just confused at one thing in particular

Magma: uh, I know that we made our own freezing pod to preserve Tsukasa a while back and this one is pretty advanced and all, but one thing doesn't even get me.

Senku: oh yeah, and what's that?

Magma: ... when did this guy freeze himself?

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Everyone widened their eyes in surprise at hearing Magma asking that oddly smart question about Aiden in the cryo-pod, making everyone stare at Magma while Kaseki approached the pod to inspect it and find a clue... or a label on it somewhere

Kohaku: now that you mention it, you have a good point Magma.

Kaseki then gasped after finding a clue

Kaseki: Everyone, I found something. It's saying the date of when our mysterious friend froze himself.

Gen: eely-ray!?

Senku: (chuckles) so, what's the date?

Kaseki then pointed at the label he found, which says the exact date on when Aiden froze himself in the pod

Kaseki: the label here saying these numbers... 1, 9, 2019.

Senku, Gen & Taiju widened their eyes in shock at immediately knowing what those numbers mean

Taiju: wait a minute? .... THAT GUY IN THE CRYO-POD WAS FROZEN 5 MONTHS BEFORE THE WORLD WAS PETRIFIED!!!??

Kaseki, Magma & Kohaku widened their eyes in surprise and stared at the pod while senku stared at it with a stern look in his eyes

Senku: we're letting him out.

Then Magma pulled out his hammer and raised it up getting ready to break the pod and release Aiden

Magma: WAY AHEAD OF YOU!!!

Gen: WILL YOU PUT THAT DOWN, YOU BIG OAF!!!

Magma: WHAT!? SENKU SAID WE'RE LETTING THIS GUY OUT, SO I'M DOING IT!!

But before he could smash the pod wide open..

Senku: No, Magma, we're not letting him out by breaking him out. I'm sure that after our friend here being frozen for over 3,000 years, this pod is probably on Life Support and that means we need to find a way to-

Then Kohaku spoke

Kohaku: What about that switch over there?

Everyone turned around and see a computer setup with a switch saying ''If wanted unfrozen, pull switch''

Kaseki: (smirks) wow, that's convenient.

Taiju & Gen nodded in agreement with the old man inventor as Senku smirked and walked up to the switch as he pulled it, making the alarms go off and start blaring

Magma: OH!! That's very loud!!

Kohaku: wait look!!!

She pointed at the cryo-pod, which opened as Aiden walked out of it and instead of saying ''who are you people'', he just fell as Kohaku ran up and caught him before he could hit the floor

Then Aiden sighs in waking up as he clutched onto his forehead

Aiden: Ugh, what happe---(wide eyes) huh?

He asked as he and Kohaku stared at each other in the eyes and then blushed lightly, then thought the same thing in unison

Aiden & Kohaku: (thinks) Oh Man, he's/She's Hot!!!

Magma: uh, excuse me?

Aiden stopped blushing and stared at Magma

Aiden: who the heck are you?

then Senku spoke up to answer Aiden's question

Senku: that's just Magma, one of the toughest men in my Kingdom of Science.

Aiden widened his eyes at recognizing that voice and noticing Senku, along with Taiju & Gen in his bunker as well

Aiden: Are you that smart guy from highschool!? Uh.... Deku, right?

Senku deadpanned at him for mistaking his name

Senku: Close, but its senku. Ishigami senku.

Aiden then stood up and stared at Kohaku

Aiden: thanks for catching me, uh...

Kohaku: My name's Kohaku, (smiles) and you're welcome.

Aiden smiled at her thanks and stared back at Senku & the others

Aiden: so, care to explain why are of you wearing clothes like that?

Gen & the rest (minus Senku) sink their teeth in nervously, making Aiden confused

Aiden: what? .... (wide eyes) wait a minute, how long was I frozen in here?

Senku: .... You've been frozen for over 3,700 years. 5 months after you were frozen, there was a mysterious event that caused all of humanity to be petrified except my dad and 5 other astronauts.

Gen: not to mention that Kohaku, Magma, Suika & Kaseki here are few examples of them being descendants of those astronau-

But before he could finish, Aiden just walked past him & the group as he headed towards a storage crate and pulled out a coat, some armor pieces, and a helmet and then looked at the group

Aiden: please leave, I need to put this on, and I'd like to have a bit of privacy. (looks at Gen) and as for YOUR Story, I'll believe it when we go outside.

(French Voice: Later)

While Aiden was putting on whatever clothing he's gonna wear, Senku & the others went back outside to wait for him once he finished suiting up, or at least they were until they hear the bunker door open up and see Aiden crawl out of the bunker in his new suit, which is pretty modern and all that to those who know what Aiden's outfit came from

Aiden: so, what do you-

Then his eyes widen in shock at seeing the forest in front of him because before the petrification event occurred, the bunker was just located under an old warehouse and then he looked back at Senku & the group as Gen crossed his arms

Gen: (smirks) you believe us now?

Aiden: .... (sighs) yes, now I do.

Senku: hmm, good. Now I think it's time to get back to the others since they're probably wanting meet whoever was sleeping in your bunker.

Gen: in other words, he's referring to you.

Aiden deadpanned and shrugged his shoulders as he followed Senku & the gang back to the Kingdom of Science while Kohaku was just staring at Aiden in wondering about one thing relating to him

Kohaku: (thinks) why was that guy frozen in that bunker back there?