Alright guys, another fanfic. I know, I know I still have other 2 on going but this one just can't get out of my head! It is a Mob!AU of Undertale and oh my oh my, please give it a chance to live! I promise I'll make you happy so please, give it a chance. This is only a pilot chapter, nothing official yet because I just want to see how you guys react to this so please, leave a comment. Give me some pointers to improve if you can and I'm sorry if this chapter is boring, it's just how I thought it would be so please, try to get through it without quitting ;(. This is a Reader/OC story so please, do not be confused. I'll explain more when the time is right. I love you guys to the moon and back and Goodnight!

PS: 1) Gaster!Sans is here and so is Gaster!Papyrus. One of them is one of the character's love interest.

2) what I mean by character is that one of the two main character that you can put yourself in thee situation.

3) BTW, Mob!AU does not belong to me but venture through tumblr, you'll find its amazing creator. I did and I never regretted it. Also, the picture do not belong to me. Lovely work done, pencilsloth of tumblr! I love it!

The sky was oddly gray that day, but it wasn't raining nor would it seemed to rain. Very few cars hustled and bustled on the wide central street that was laced with big building. A few people were walking on the streets and yet it still felt as if barely anyone was out.

Year 193X

Undertale City

A city that nearly topped the class for its crime rate and drug abuse. Streets filled with dirt, where the poor had no power unless given and the rich had everything. In this city, only the powerful ruled the streets. Powerful families or mafia would control each sector. There were still rich families but out all of them stood the De Silva royal family. Well, not royal but with the immense fortune they have, even the staple royal family stereotypes couldn't be compared to them. Owning the largest sector of the city, Master De Silva, an alibi of course, the head of the family, lived in luxuries with his pregnant wife and sweet daughter. A dotting father slash husband, he was ruthless outside his home. Taking what he wants, he was everything a mafia Don would want to become. No one defied him with the outrageous amount of power he had, not even the two leading Mafia organization.

The Fallen and Delta Rune.

Was it mentioned that the city was shared between monsters and humans?

No?

Well, take a seat and welcome to Underground City.

The city of The Fallen, De Silva and Delta Rune.

The forces that wants all the control of the city. From the bad, worse to the horrible, they were all here, all clumped up in one place. Delta Rune, belonging to the monster race, can be an aggressive mob if they were pushed but was usually kind towards people who do not belong in their organization, ignoring them, unlike their counterpart, The Fallen, who was led by a vicious figure with the initials of CA. Their motto were 'it's killed or be killed' and their purpose?

To dominate both De Silva and Delta Rune.

Leaders of these organizations or families were never seen by the public, nor do they want to. They all always go out in secret, the eyes of media never being able to catch them. Speaking of their leaders, here were one of them, riding through the streets in their black limousine with bodyguards hidden all over the area.

Black limousine within the city meant whoever owned it is an important person.

And this time, it was W.D. Gaster of Delta Rune who was inside the vehicle.

Stopping at a red light, Gaster looked out of his tinted limousine's window.

But oh wait,

What' this?

Another black importance had stopped just beside his and between them was a figure riding an expensive looking motorcycle. The figure seemed but be female, black matte helmet covered her head with black visor. She was wearing a black leather jack, white fur trimmed around the collar with black sweater underneath. Fingerless gloves swallowed her hands and she gripped on the handlebars, roaring her automatic steed to life. Loose pants that was decorated with lots big pockets hung from her waist and combat boots made themselves home to her feet. She was riding a handcrafted Ninja motorcycle, matte white with traces of black and red in parts of it. Just by looking at that motorcycle, Gaster knew she was an important figure.

She tapped her feet that was on the ground, which was stabilizing her bike and herself, impatiently. She felt like something was watching her so the helmeted head turned left and right to look but found nothing suspicious and finally rested her gaze on the limo on her right, which was Gaster's. The feeling of being watched by an unknown face made Gaster shiver, strangely enough since he barely does so, especially when that unknown face was wearing something that made them seemed more mysterious.

The two had a mini staring competition, both unknown to each other and both curious by what lay beyond the tinted glass that shielded each other's face. The woman's gloved hand went over to the side of the helmet, as if she was about to slid the visor up, before a string of gunshot ripped through the air. The sudden noise startled them both and the woman quickly looked around once more and proceed to kick the side of the limo on her left as hard as she could. The limo sped away as quickly as it can, followed by the mysterious biker leaving a trail of deep rumbling noises from her engine.

A few other biker whirled too quickly for Gaster himself to react, speeding past his car to chase after the other limo that just escaped. Just before they could got out of his view, a few more gunshot was heard and one of the biker fell on to the road, its side scraping against the cement. By now, the pedestrian have completely gone berserk and were running everywhere.

Gaster commanded the driver to follow the strange biker, but not too close that he had a chance of getting hit by the action. His driver drove further forward and stopped when they heard another pair of gunshot followed by a scream. Gaster saw that the limo that was just fine a few moments ago now thrashed, scrunched up after colliding with a nearby bus stop. Its window shattered at the front and the driver of the said car seemed to be dead.

The mysterious biker skidded to a stop, took out a gun from one of the pockets of her pants and shot a few round to, what Gaster thought, scare the attacker away. She then leapt off the bike and rushed to the damaged vehicle, opening the passenger door roughly with a chain of curses lecing her voice to reveal a girl that was wearing a simple black dress with white collar.

Could it be…?

Before Gaster could observe the face of the girl, the mysterious woman had took off her helmet and placed it on the girl's head instead, covering her whole face. She then took out a mask from one of her pockets, tying it around the lower part of her face. She helped the girl got up and led her towards the bike, guiding her up before climbing on to it herself before any of the attacker could fire another round.

Gaster smiled and clapped out of delight as the two sped away, quickly telling the driver to follow them with a grin on his already forever grin. Streets after streets and from one turns to another, the woman seemed to be trying to confuse her attacker who she thought might be following her.

Well, she was half right.

But the Riverman was a good driver.

The pair he had chased ended up entering a compound of luxury, decorated with a glorious fountain and a garden so green you'll mistaken it as garden of Eve which sat behind the sky high black gate with maximum security. There were statues along the road that led to the massive mansion that was behind the gate. The motorcycle sped down the road of the entrance and into the basement garage of the mansion, disappearing from Gaster's sight.

So I was right… They we're who I thought they were…

On the black curvy gate was an initial engrave on it.

D.S.

Queen De Silva…