The F-rank Adventurer, Who Was Supposed to Be Just a Helper, Accidentally Goes Viral for Blowing Away an S-rank Monster – It Seems the Home I’ve Been Living in Was an Unusually Powerful Dungeon Inhabited by the Strongest Species

“Wow, so that’s why you do dungeon streaming,” I murmured, gazing at a floating object in the dark, cave-like space.

“Yes! It’s called a floating camera!” responded my childhood friend, Nanami Amanogawa, who was beside me.

Nanami, a lively and energetic girl, is known for her shoulder-length brown bob hair and big, round eyes. She might be a bit rough with her words, but that just means we can say anything to each other.

“You’re an explorer and you don’t know this?” she teased.

“I’m not too familiar with that sort of thing.”

“Everyone knows about it these days.”

Dungeons suddenly appeared all over the world one day. Now, it’s become normal, and those who delve into dungeons are called “explorers.” That’s common knowledge, but recently, “Dungeon Streamers” who broadcast their explorations have become a new form of entertainment.

Nanami is one of those dungeon streamers. She has many subscribers and seems quite popular.

“Maybe I chose the wrong person,” I wondered aloud.

“Hey, that’s rude.”

Nanami and I──Hikone Hoshi──attend different high schools. We’ve only been in touch lightly recently, but three days ago, she suddenly invited me. I was free, so I accepted, and here I am, helping with her dungeon stream.

As Nanami said, I do have an explorer’s qualification.

“So, shall we start? I’m going to begin the stream,” she announced.

“That’s too sudden.”

“It’s time already.”

And with that, Nanami started the stream, operating the camera.

“Good evening everyone! It’s Amanogawa Nanami!”

“!?”

Nanami suddenly raised her voice and started talking in a high-energy tone. I was surprised and looked at her with confusion.

The comments started flooding in like a hologram from the camera, but I didn’t interject. Maybe this is standard for streaming.

“Today, as announced, I’ve brought a helper! Please, go ahead!”

“…! Hi, Hikone Hoshi here.”

I somewhat awkwardly bowed as I moved into the frame.

The comments started to discuss me.

But in this case, it’s not that I’m low energy, it’s more like Nanami is…

“What’s up?”

“No, just that your voice suddenly got higher…”

“It’s a stream! Of course, I’m going to raise my energy!”

The chat reacted humorously.

“Ahem. Let’s get back on track.”

Nanami spread her hands wide.

“Today’s dungeon is a new one that just appeared recently!”

“Eh, really?”

“Yeah. It was formed just two weeks ago and opened to the public yesterday.”

“I had no idea.”

The chat continued, showing that Nanami’s behavior was the same on and off the stream.

“So, what rank is this dungeon?”

Dungeons are ranked from F to S, with higher ranks indicating more difficulty. These ranks are determined by a specialized agency before public opening.

At my question, Nanami answered with a grin.

“Get ready to be surprised! It’s an S-rank!”

“Eh?”

The chat reacted with surprise and concern.

“But don’t worry! Only F-rank monsters appear on the upper floors!”

“Is that so.”

The chat seemed relieved, and I felt a bit better too. Maybe the earlier comment was a joke, knowing this.

But I still wondered.

“Why choose such a place?”

“For the buzz, obviously! It’s fresher and more interesting than familiar places!”

“I see. Dungeon streaming is tough, huh?”

“Don’t say that!”

The chat laughed and teased.

“Anyway, I don’t really need a helper in such a place.”

“Eh? Can I go home then?”

“No, no, no!”

The chat reminded me.

Right, Nanami is afraid of the dark. She wanted to come here for the buzz and invited me to help her. She’s really trying her best.

Then, a comment caught my eye.

“What’s your explorer rank, Hoshi?”

Explorer ranks are similar to dungeon ranks.

“I’m F-rank.”

The chat reacted with surprise and concern.

“Well, I’ve only explored one dungeon…”

The chat grew worried, but Nanami reassured them.

“Everyone, don’t worry! I’m here!”

The chat responded humorously, but Nanami got a bit upset.

Anyway, we continued exploring the dungeon.

After a while, Nanami defeated the monsters and I applauded from behind. As the chat said, only weak monsters appeared on the upper floors.

“Alright, let’s go this way next!”

But then, Nanami deviated from the planned route.

“Wait, that’s the wrong way.”

“My streamer’s intuition says this way!”

“Well, okay then.”

But this decision was a mistake.

Suddenly, the area became darker and then…

“What is this!?”

“Nanami!”

We couldn’t escape

, and the light engulfed us, transporting us somewhere else.

When the light faded, I opened my eyes, and Nanami gasped in shock.

“No way…!”

She was shaking, and in front of us was…

A green-winged wyvern glaring at us.

The chat exploded with shock and concern.

The wyvern roared and attacked with its tail, but I pushed Nanami out of the way and took the hit myself.