Create a new version of paste:

You tell her that with some knownledge and and proper tools and parts, any broken stuff from the outside world can be fixed.

“I see.” Keine nods. “Have you ever met with Kappas on the Youkai Mountain? They are able to work with devices similar what you fix now.”

You nod, then ask her about the villager's distrust with their devices to confirm if it's true or not.

“Yes, it's true.” Keine sighs. “The suspicion comes because of our inability to understand how their objects work. Let me take one example: There are rumors that the photographic device that the mountain Kappa made is able to absorb souls of anyone that falls into the center of it's frame. I asked Aya about it, and she laughs it off as a silly superstition, because her camera can't absorb souls.”

Capturing souls? You remember there was a horror game with similar premise... Whatever.You asks her if anyone ever tried to clear the distrust to the Kappa.

“You mean mountain Kappa. The Kappa that don't live in the Genbu Ravine are... Dangerous to humans. They will attack humans when the opportunity is presen-” 

*Tap Tap!*

“Afternoon Keine.” A familiar girl comes to her: It's the white haired woman from the other day. “Quite a crowd that you have here.”

“This man fixed one of my student's toy from the outside world.”

“That thing?” She examines the tv-console from the rear and back without interrupting their playing session. “Looks like one of Genbu Ravine Kappa's inventions.”

Welp. Quick, think an excuse...

“I heard most of their invention are created from outside world's objects that fell into Gensokyo, so it wouldn't be a surprise if it looks similar.”

Phew, saved by Keine...

“Spray that paint!” Sanae commands. The plumber, controlled by one of the kids, does that and absorbed into the paint.”

“Where did he go?”

“It's the first level of the game! You need to clean the place and exterminate the goo youkai! Oh, and collect the coins and stars too!”

“'Level?'”

“Level is the place where you have to complete a challenge. Now go ahead and find that goo youkai!”

One of the kid moves the plumber forward. He missed some of the coins on his way.

“Hey, you missed that one!” A boy in the crowd yells to the one whose hold the controller.

“Don't worry, you can finish the level without collecting all the coins.”

“Then why collect the coins if we can beat the level without one?”

“You'll get extra lives if you pick 100 of them! Well, at least that's how the coin works in earlier games, but I don't know in this game since they have a health bar.”

“'Extra lives?'”

“Hm... How to say it...”

As Sanae thinks, a big flower bites the red plumber, reducing his health slightly.

“Be careful of those youkai attacks! If you let him get hurt too much he'll be eaten by those youkai!”

“Waaah, scary...”

“Don't worry, it's only a game, you'll be fine! But you don't want the hero to be defeated by those youkai, right?”

Those kids still thinks that the world in that game works like real life. Good for their imagination, you guess.

“That's what outsiders nowadays play, a game of exterminating youkai?” The white haired woman comments. You point out to her that most of Sanae's explanation is only made up to make the kids excited with the game, just like how when parents are telling tales to their children, they made up some details if their kids asked the details of the story.

“Then what's the real story of the game?”

Uh... The story is a bit nonsensical, but you'll tell her anyway.

----

“So the big bad is a giant tortoise-dragon and his son?” Keine stares to you. You point out that the entire game is a fictional work, and she shouldn't be surprised to find it illogical. Kids wouldn't notice too much detail in the story anyway, since they should be focused on defeating monsters, and even if they do ask the details, you can make something up or let their imagination do the work.

“Not the weirdest story that I've ever heard,” The white haired woman raises her shoulder. “Do you know the story of the goddess of food, Uke Mochi?”

Uh... Can't recall anything about her.

“She was killed by the moon god Tsukuyomi, when he was representing his sister, the sun goddess Amaterasu, on a feast because of her way of serving her foods.”

You thought gods or goddesses are immortals except for their lack of faith... Whatever, it's only a legend. You ask her what's wrong with her way of serving food.

“She churns out foods from her mouth.  He knows it and stabs her with his sword in disgust.”

...Well, he can just refuse- Wait, why did she tell this legend to you?

“You don't find it weird, compared to the story of the game that you wrote to me?”

Uh, it makes sense in context... Maybe. You'd probably get disgusted too if you know your hostess vomits foods and serves it to you, but she's the goddess of food, as she mentioned earlier. Her power to produce food on a whim should be expected. You tell her that the fact that a goddess can be killed with a sword is more jarring to you than Uke Mochi's ability to vomit food, since she's the goddess of food. 

“Heh. Interesting.” She pokes your forehead with her index finger. “With that mindset, you're suitable here in Gensokyo.”

*Tap! Tap!*

More and more crowds gathering to see Hiroshi's toy. All of them are adults.

“What is that thing?”

“This is a fixed object from the outside world!” Sanae turns her attention from the kids to the adults. “They can do wonder if one knows how to operate these machines!”

“What's that object do?”

“It's an entertainment center!” She claims. “Like a theater, but you can control the character in the story!”

Many people whisper to each other, discussing the device. Frog-Suwako hops off from your head to the ground. What's she doing?

“Is it safe?”

“Of course! It's only a device for fun, it won't do harm to anyone!”

Yeah, except when it's thrown at someone's head. Heh. Good thing that the kids won't do it anymore.

“Lady, could you fix my device from the outside that I found?”

“It's-”

*Hop!*

Frog-Suwako hops on Sanae's shoulder. She stops talking for a while, before she answer the man.

“I'm wasn't the one fixing it, it's that man who fixed it! He can fix any objects that he sees!” Sanae approach Hiroshi that stands near her. “Isn't that right, Hiroshi?”

“Yeah, Mister Nobu has fixed my toy and told me how to properly play it!”

“Really?” The man turns to you. “Please wait, I'll bring it right away!”

What. No no no no. You don't even- ah, he's gone. You walk to Sanae and write "what the hell was that for?".

“Sorry Nobu, Lady Suwako told me to do that...” She whispers.

“Come on Nobu, be brave! You can do it!”

Be brave... You can fix everything that you see. If that man bring some machine that needs fuel, you're screwed, there's no way you can make that work, like a generator or-

“Here! Sorry that I take too much time.”

He shows you a calculator, not the scientific one, it's the one that shopkeepers on the outside world usually used to count total price that the customer has to pay. If not they probably used cash register nowdays... Anyway, it's not hard to find what's wrong with that thing... Maybe. You take it and grab a small screwdriver inside the bag near you. Let's hope it's not something that you need to replace...

“Sanae, now!”

Suwako yells into her mind, and she starts reciting another miracle..

-----

“Quite a sight, don't you think so?” Yukari pops out from her hole.

“Yukari, that man is able to understand his world technology, and he bring the knowledge to the villagers.”

“I can see that. What's the problem?”

“Yukari, if technology grows in Gensokyo-”

“Stttt, Akyuu...” She looks to her companion at her side. “Do you remember what I said to you before, a long time ago? 'As long as the Outside world is dominated by humans, youkai will prevail in Gensokyo, no matter what.'”

“That's why we should stop him, he will make-”

“Akyuu, Gensokyo was created to preserve Youkai from the outside world, but do you know that it also work in reverse?”

“What do you mean?”

“If humans dominate Gensokyo, then the outside world will...”

Akyuu opens her eyes widely, a scary realization hits her.

“Whatever this man chooses will affect Gensokyo, one way or another.”

(Note: Tell me if you don't understand what Yukari mean. I feel like I should re-write her wording to make her implication easier to understand.)
(I think it's pretty clear what she means. Pretty cool twist there.)