A geological roadblock

Not too much further into the cave, you suddenly bump into something. You reach out your hand, carefully surveying the obstacle while your other hand stays glued to the wall. It’s fairly soft and round, but there’s quite a lot of resistance if you push on it… The smooth but slightly rough texture reminds you of fabric. You’re just about to conclude that the object is a giant sweater wrapped around a boulder, when suddenly you hear a voice.

“Hehehe… Suddenly meeting a beautiful girl in the middle of a cave, with no one else around… It seems my chance has finally arrived! This must be fate.”

“Huh!?” you jump. “Y-You’re a human?”

The voice clearly belongs to a man, and it’s rather deep but also a bit nasally. He continues, “Why yes, I am. Are you a busty alien girl, encountering a human for her first time? Or perhaps a well-endowed princess from a faraway country who lived a sheltered life, void of contact with other humans until you escaped? Maybe a buxom beauty from another dimension, here to explore the human realm for the first time?”

“Nope, none of those!” you answer. “I’m Emilia, and I’m from Rifure Town.”

“A small-town girl, braving the wilds all alone… I see… hehehe…” He’s breathing kind of heavily. Maybe he’s just tired. “So Emilia, whatever are you doing in Mt. Moon? Are there any pursuers you need saving from? Something you lost that’s precious to you? Perhaps a quest that you stand no chance of completing on your own? I’ve heard stories of girls with great potential that can only be unlocked with the help of a man who is seemingly ordinary, but can ignite a fire within their-”

“No, not really,” you interrupt. “I guess I’m kind of on a quest to become a Pokemon Master, but I can do that all on my own for sure. I just bumped into you on accident because I can’t see. Cuz of the darkness and all. Sorry! I’ll just go around you.”

“Wait a minute,” he blurts out. “Don’t tell me you don’t know… the Secret Technique?” You can’t see your conversation partner, so your imagination is doing a lot of work here, but you’re fairly certain he’s wearing glasses, and he pushed them up on the bridge of his nose during the dramatic pause of his question.

“Huh? Secret technique?” you ask curiously.

“No. Secret Technique™. People used to have pokemon light the way through dark caves, but nowadays, everyone uses the Secret Technique to see in the dark! I’m surprised you’ve wandered this far in total darkness.”

“See in the dark!?” you exclaim, your voice loud enough to echo throughout the cavern. “That’s too cool! How do you do it?”

“Hehehe… I knew this was my chance. Emilia, I will teach you the Secret Technique! You may shower me with appreciation however you see fit once we’re finished. Nothing is out of bounds, really. Even some intimate traditions from your rural hometown would be acceptable, regardless of how exotic those traditions may be.”

“U-Um, sure, okay. By the way, what’s your name?” you ask.

“You may call me… Sensei.”

There it is, you heard it that time! He definitely pushed his glasses up. So far, the picture you’ve built of him is someone who’s relatively tall, very big and round, wears glasses, and breathes heavily. That doesn’t sound like many “senseis” you’ve seen in movies, but maybe you’re just getting caught up in a stereotype. The fact is, some strange, random man you met in the mountains is offering to help you see in the dark!