So, hello! And welcome to my first ever story! Now, I'm a huge One Punch Man fan, and Metal Bat is one of my favorite characters by far! When I first saw his "Fighting Spirit" I immediately thought of Undertale's "DETERMINATION". So, then I imagined Metal Bat and his sister taking the role of frisk, and, well, this happened! Now, I know Undertale gets a lot of hate for its "Cancerous" fan base, but that doesn't stop me from loving it! And if you're reading this story, then you must like the game too! Well, enough of my rambling, on with the first chapter!

Z-city was a city most well known for its constant monster attacks. However, that was not all the city was famous for. It was also home to the legendary Mt. Ebott. The legend says that any who go there never return.

Of course, not everybody knew of that legend, one of whom was a certain S-class hero bringing his little sister on a camping trip.

"Come on big brother! The view up here is amazing!",

A young girl, no more than 10 called down the mountain.

"I'm coming Zenko, just, huff, give me a minute."

Badd, AKA Metal Bat, the 15th ranked S-class hero came trudging up the mountain, carrying a comically large bag, as well as a cooler and a large tent.

The 17 year old hero was dressed in his usual attire, a red long sleeved shirt covered by a black leather jacket, his signature weapon, his grey metal bat hung off his belt, kept on him in case any monsters happened to be nearby.

"You want to set up here Zenko?"

"Yeah! Look, you can see the whole forest from here! It's so beautiful!"

"Whoa, yeah you're right!"

As he approached the cliff overlooking the forest, he spotted a peculiar sight.

A tall, slim ancient looking tower was barely visible over the mountain. Of course, being Badd, he didn't think twice about this suspicious looking sight.

"Well, come on Zenko, I didn't take the day off so we could stare at trees! Let's set up the tent, then we can make a fire and have hot dogs!"

"Okay!, can we go exploring after we eat?"

"I don't see why not."

"Just make sure you stay close to me, I would never forgive myself if anything were to happen to you."

"I'm not a baby Badd, I can take care of myself, you don't need to obsess over my protection!"

Badd sweatdropped and scrambled for a response.

"I know, I know, it's just that monsters could be on the mountain, and I wouldn't want you running into one while I'm not with you."

"Fine. Just make sure you don't do anything stupid yourself!"

As Badd and Zenko were setting up the tent, a buzzing sound started to emit from Badd's pocket.

"Oh what the hell is it now!?" He whispered under his breath.

"I'll be right back Zenko! I just gotta pick this up." He yelled as he walked around the corner.

"Is it work again? Come on Badd, you said that we would have the whole day to ourselves!" She pouted.

"What the hell is it?" Badd snarled at the phone.

"I'm sorry For interrupting your day off Metal Bat, but we forgot about the S-class meeting when we issued it to you. We need you to be there, it is of utmost importance for the hero association's future as well as the safety of the citizens we protect!" The hero association executive Sitch stated over the phone.

"Yeah, well then put the meeting off until tomorrow afternoon! I promised my sister that I would spend the day camping with her! She's been asking to go with me for months, but you jackasses kept preventing me from taking her! I finally got a chance to, and I don't need you ruining it yet again!"

By the time Badd had finished his rant, his eyes eyes were bloodshot, and veins were popping up on his forehead, a sure fire way to tell he was pissed.

"U-um, well, I suppose we have had you on duty more often lately, I guess it wouldn't hurt to postpone the meeting until tomorrow, but like I said, this meeting is very important, we NEED you here tomorrow alright?"

"Yeah, yeah, fine, whatever, I'll be there okay?" He snarked, having calmed down a little.

"Thank you Metal Bat, and again, I apologize for interrupting your day off." Sitch finished, hanging up.

Badd took a deep breath.

"Sometimes I wonder why I still put up with this shit."

As Badd came back to the campsite, Zenko came up to him with a worried, as well as stern, look on her face.

"Was that the hero association again? We don't have to leave already do we? You promised you wouldn't get called in today!" She berated him.

"Calm down Zenko! Yeah, it was the association, apparently I was supposed to be at some meeting today, but I convinced them to move it to tomorrow afternoon. So no harm done." Badd explained.

"Well, if you're sure that you won't get called in, I suppose it's fine." She said after thinking for a minute.

"Well, let's finish getting the tent set up, then let's go explore the mountain!"

"That's fine with me. Let's get to it."

Badd and Zenko had just finished setting up the tent, and were now finishing up their dinner, which consisted of roasted hot dogs.

"Man, that hit the spot!" Badd said with a content look on his face.

"Hey big brother! Now that we've finished eating, can we go see what's on the mountain?" Zenko asked, a grin plastered on her face.

"Heh, how can I say no to a face like that? Come on, let's go."

They began their trek up the mountain, unaware of what awaited them in the near future.

"Hey Badd! Come check this out!" Zenko called it to her brother.

"Huh? Zenko what are you doin over there?" Badd walked over, seeing Zenko looking curiously into a cave.

"Look inside Badd! There's some sort of pit or hole with light shining down. Isn't that weird?"

"Hey, yeah, that is pretty strange."

As he went to get a closer look, he noticed something at the very bottom of the pit.

"Hey, looks like it leads to some sort of cave down there, and what's with those flowers?"

Zenko came over and looked down as well.

"Hey, you're right! Wait, don't you think that those flowers are arranged a little too uniformly to be natural? I mean look, they form a perfect rectangle!"

Badd looked down again.

"Huh, you're right! That is pretty weird. You don't suppose anyone lived down there do you?"

"No! Why would anyone live under a mountain? Maybe there are monsters living down there!" Badd scoffed.

"Nah, that's ridiculous, no monster would go around planting flowers like a pansy. They prefer causing chaos and destruction."

"Yeah, I guess you're right about that at least. Well, whatever's going on down there, it's no problem of ours! Let's go climb to the top of the mountain big brother!"

Zenko spun on her heel and was about to follow Badd out of the cave, when suddenly, the ground cracked beneath her feet.

"Wha?!" Zenko yelped as she lost her balance and started to fall into the hole, when Badd grabbed her, stopping her plummet.

" I gotcha! Hold on Zenko!" Badd said, starting to pull her up.

Unfortunately, the ground cracked once more, making Badd slip and fall as well. Zenko's horror filled eyes stared into Badd's, as they both fell into the cave below.

So, how was that for a first chapter? I will always have at least 1000 words per chapter, so there is enough to tide you over until the next. Comments and criticism is very appreciated, and I hope that you enjoy my story!

Edited 3/13/20