UnderPeace

"Peace is always born after wars" -Temmie/UnderPeace
UnderPeace setting, mainly for a change, is monsters and humans are coexisting peacefully, so there is no Underground story like Undertale.
==Story==
====The Age of Legends====
The history of UnderPeace goes back to the Age of Legends, in which humans and monsters have emerged and rule the Earth. They were not as peaceful as they are now, due to their prejudice and antagonism between them. Humans lived on the surface, monsters lived Underground instead. Unlike Undertale, there was not a barrier covering Underground. Legend has it that they had to fight various mysterious beasts that appeared in different places.
Yet everything was changed until the mythical beast recorded in history appeared, bringing unprecedented disaster. Humans knew they could not defeat it with their outdated weapons. Therefore, after two races had a meeting, they decided to cooperate to kill it. In the course of battle, they discovered the good of each other.
When it was killed, and then dissipated in the air, leaving a black crystal chip on the ground. Due to lack of experimental apparatus and scientific resources in humans at that time, they let monsters have it. Monsters wrote a promise to Humans. The promise was that: The monster was given the object but had to share its power after doing the experiments. 
But the peace did not last long, some humans began to suspect that monsters were attempting to destroy humanity in order to unite the world. To avoid the conjecture happening, they shamed and even slandered monsters for killing humans, trying to get rid of them as soon as possible. However, these accusations were happening abnormally quickly. The human king then told it to the monster king. Upon examination, the monster did not do those bad things humans said it did. This intentional act was eventually discovered and provoked monsters completely. 
Despite the human king having exchanged GOLD for peace and warned humans to stop being racist, this peace did not work very well. Humans remained obstinate, monsters were pushed beyond their endurance. They stopped all their experiments and prepared for revenge. An infighting soon happened, their commanders were Sally and Gaster respectively. No day passed without peace as the battle left many craters in the ground, covered with signs of artillery fire use. The commoners were in deep water but had no choices. Many people were injured. Fortunately, nobody was sacrificed. After a long battle, the two kings suddenly proclaimed that they had taken a compromise. Humans finally let down their guard and probably became nicer to monsters.
==== The Rise Of Peace Organization====
During the war, those who had been injured and affected by the war gathered in secret and formed an organization. They aim for peace. Members of it have absolutely no fear of death, waving their flags with the words “Without war, there is peace”, etc. in the places where fighting was taking place. The organization started going from unpopularity to fame when it was known by almost everyone. The members constantly pressured the two kings for peace, it might have been one of the reasons why the two kings adopted a compromise.
Monsters returned to their former profession, experimenting with the CORE. After a relentless effort and the help of humans, they almost finished it. However, they encountered a severe situation when they discovered that CORE's power might be too strong, and would suck them in somewhere, even to their death. Seeing that no one was willing to risk, one of the main scientists Gaster stepped forward. Everyone advised him to give up so as to saving his life. He knew he was being too stubborn, his inner struggle with why he was doing this, what if the solution wouldn't lead to anything, what if he failed. But it was too late to regret, he had no choice now. Fortunately, He succeeded in inventing the CORE of which there were many discoveries. 
(Note: Peace ≠ No deaths)
== Characters ==
===Undertale Characters===
====W.D. Gaster====
*As known as Omega!Gaster who is a peaceful pacifist that has been absorbing lots of human SOULs. After he had completed inventing black crystal, he said he got such significant things to do that he was going to lose a lot of time. Frisk and Chara are used to him leaving UnderPeace and understand the reason.
* He is the mentor of Frisk and Chara. After trying to implant them with monster SOULs, he teaches them high-level magic and some CODEs, and also gives them a lot of protection. He doesn't even want them injured but training is always necessary, so he will keep eyes on them.
====Frisk====
*They are androgynous or genderless
*They are apprentices to Gaster
*Before the black crystal was invented completely, Frisk had been astounded by Gaster’s exceptional and flamboyant magic and promised themselves that was determined to be as awesome as him. In search of more information about Gaster, they spent every moment immersed in him but Gaster was invariably disappearing without apparent reason, making Frisk's investigations not very successful. One day, defying all expectations, Frisk rushed to the surface of Gaster's residence. By good coincidence, Gaster was in the middle of an experiment there. Seeing Gaster was there, Frisk immediately knelt before him, put their palms together and requested Gaster sincerely to let themselves his apprentice. Thankfully, he agreed. Despite what a wonderful thing it was to be an apprentice, they thought it was rather lonely to be the only one, so they “recommended” Chara that also do the same.
====Chara====
* They are androgynous or genderless
* They are apprentices to Gaster
*They were not actually interested in being apprentices of Gaster. They just wanted to live a normal life like others instead. Once Frisk decided to be an apprentice of Gaster and told it to Chara,  but Chara didn’t entirely care they were eventually convinced by Frisk after a long argument, despite reluctance, Chara are forced to be an apprentice with Frisk.
====Sans====
*In UnderPeace, Sans doesn't exist. (Reason: see Omega!Gaster's trivia)
====Papyrus====
*In UnderPeace, Papyrus doesn't exist. (Reason: see Omega!Gaster's trivia)
==== Asriel====
*The son of Asgore and Toriel. He is a teenager already and a bit lazy. Currently, he is assigned to teach some of the talented human adolescents to possess magic particles. He actually doesn’t want to do so but is forced by Toriel to familiarize himself with human culture in order to have leadership by the time he will become monster king.
==== Asgore====
*Father of Asriel. Although he is currently the monster king, he prefers to stay with his family as much time as he can. He never severely orders others to do as he says, so the monsters are free to do anything except what is illegal.
====Toriel====
*Mother of Asriel. Also, she is the monster queen. Likes other AUs Toriel, whatever who comes to her house, she loves making them pies, notably apple pies. Asriel, Frisk and Gaster complain that her infatuation with pies as if she only can cook pies.
==== Alphys====
*Somehow used to be Gaster’s assistant. Gaster passed on some experiments and simple CODE to Alphys, who encouraged her that she could do as well as he did. She continues to study the notes Gaster has written in the hope that she will become superior.
====Undyne====
*One of the training officers who trained monsters and humans in the use of strength and heavy weapons. 
====Mettaton====
* The owner of MTT Resort.
====Napstablook====
*Still a cousin of Mettaton, the cause of death is unknown. More aggressive than Undertale, sometimes may appear to have a smile. He is a DJ and singer of MTT Resort.
====Muffet====
* She has opened a café on the surface, selling self-made sweets and coffee. Unique recipes attract many people to come and taste them. She would never tell anyone her secret recipe, but Gaster knows.
====Temmie (Bob)====
*Bob has left with other Temmies and self-reliance. Despite being heavily influenced by its property, it eventually passed through the University with Temmie Shopkeeper and has become a scholar already. It now follows Gerson in his search for more information about ancient history.
====Temmies Shopkeeper====
* It is still living with other Temmies, looking after and teaching them. In general, it also gives Bob some money for his life. It has enough money and intelligence already so that it has passed through University too.
To be added...
===Added characters===
====Sally====
*Daughter of the human king in the Age of Legends. Since the end of the infighting, she has been disappearing, rumor has it that she is not dead. Sally is one of the strongest humans in UnderPeace. She was Gaster’s only lover.
====Current human kings ====
* In UnderPeace, there are now four kings running the human race. Each king is primarily responsible for a different job, one for the economy, one for education, one for entertainment and one for the military.
*To the military, of course, they have asked Gaster if they could make some troops to defend their AU or keep people safe, Gaster only replied  that if it wasn't used for further infighting, that would be fine.
==Locations==
===Undertale Locations ===
====Underground====
The place that monsters used to live on. Since all infighting between two races ended, humans finally became nicer to monsters, monsters can live on the surface with humans peacefully. Therefore, Underground was almost deserted and uninhabited. Fortunately, Asgore proposed to rehabilitate Underground for everyone to view and ordered that Underground have to be cleaned once a week in UnderPeace.
====UnderPeace Void ====
Unlike some Gasters, Omega!Gaster is free to teleport into and out of the Void. Once Omega!Gaster was experimenting with something hazardous, he discovered Void. It used to be miserable and dilapidated when he first looked but it is entirely decorated to a cozy area now. When he wants to have a “sleep”, he always goes to Void, he has seen Void as his home.
====CORE====
A mysterious experimental site where Gaster used to experiment with something hazardful. However, it had been destroyed due to the explosion of black crystal chip.
==== MTT Resort====
It has now been built a tall and complete edifice which is now located on the surface and directly connected to the Underground, customers can pay money to stay in MTT Resort and view the entire look of Underground. 
====Grillby’s====
A pub or somehow a restaurant now located on the surface, still run by Grillby, where humans and monsters alike can drink and eat. Frisk and Chara prefer to go there to chat or dine with others.
=== Added Locations===
====Council Chamber====
A special room which has been made by Gaster since The Age of Legends. There is an Anti-wall covering it. Both the Monster kings and the Human kings always have their discussions here. Gaster specially make each of the sitters a protection barrier to avoid any fighting inside.
====Horphan ====
An orphanage where Chara was abandoned by their parents when Chara were little. As long as the orphans are able to stand on their own two feet, they are allowed to leave or return to the orphanage.
==Miscellaneous==
===Black crystal chip===
An invention completed by Gaster but he did not tell everyone about all the discoveries made in it. It was first obtained by killing the beast. Monsters kept experimenting with it before the infighting between humans and monsters. When finally facing peace, the monster returned to experimenting.
==Chronological order==
Age of Legends➔ Monsters wrote a promise➔ The war broke out➔ Sally and Gaster broke up➔ Gaster completed inventing the CORE➔ Frisk and Chara be apprentices
== Trivia==
*Current human kings, Asgore, Gaster, Frisk, Chara and Sally are all aware of the Universe's existence.
*UnderPeace protectors: Frisk, Chara, Gaster, Sally, human kings.
*Possible UnderPeace creater or manager: Gaster.
*UnderPeace is covered by Gaster using Anti-wall.
Category:AUs
Category:Noble Bright
Category:Concept Change
Category:Semi-Serious