Kira hit the ground running as soon as he dropped. The cops were already after them and they had only started 10 minutes ago. The response time for the police force seemed to improve day by day. "Damnit… we just… started," he panted as he sprinted away from the police, his coffee colored jacket flying out behind him. Kira's short white hair blew in the wind as he ran. No less than 10 meters behind him was the Respia city police force. Dressed in black jumpsuits with large diving helmets carrying two sub-machine guns, five men chased him. Kira stopped and slid back on his right leg, the leg that was more jean-short than actual jeans. He pulled out a large cylindrical, silver, orange and black weapon, and aimed his shot. He charged his weapon all the way to full power before firing at the police agents. The agents dived back quickly, firing at him with their sub-machine guns. Kira jumped to the sky, mechanical wings sprouting from his back as he started to take flight, only to be brought down by the hail of bullets from the police force. He fell and upon hitting the ground, he uttered one word. "Shit," as he started to burn away in green flames. The head officer looked at the burning body and kicked it down. "Damn kids need to learn that this is illegal," he said.

Respia city was a large city engulfed in a large dome. Along with many other cities, it was built on top of something called an "Esper vault". Esper vaults were large pockets with a seemingly endless Esper gas supply. The domes were constructed to keep Esper in and keep the outside world, out. At first, people were cautious of the gas; however, society learned how to manipulate the gas. They realized that Esper was a valuable resource. This marked the beginning of the dome-cities. Esper was eventually manipulated to prevent death by unnatural causes. It was also discovered that Esper could manipulate reality and keep people physically fit. As long as there was a constant source of Esper, it seemed that a utopian society could be created. Esper was able to create objects like walls, homes, food, weapons, and much more. However, as the manipulation abilities of Esper grew, even children learned how to manipulate it. Soon enough, people began creating enclosed zones for Esper games. Unfortunately, the Elders who had discovered Esper, feared its depletion and the return to a poverty-ridden society; thus outlawing Esper games. Unbeknownst to the Elders, the younger generation started a truly legendary Esper game that became known as S4. Those who played S4 were part of something called "The S4 League". The S4 League was a global society of S4 players. They kept in contact with codenames, keeping their true identities a secret. S4 evolved from a simple game of touchdown, into a battle match with weapons. People known as Fumbi dealers created portable shops that sold weapon and ability packs. In S4, the rules were simple. There were a few universal rules, such as a player could only carry 3 weapons at a time and 1 skill. There were two ways to play. The first was a touchdown game. Players would enclose an area with Esper and create something that replicated a Fumbi. Players were to grab the Fumbi and run it into the opposing team's gate. The second way to play was a team deathmatch. The team deathmatch was a fight to 100 kills within one hour.

The S4 League encompassed many people, of many ages, of both sexes. Men, women, adults, and children, all possessed knowledge of Esper manipulation, therefore everyone was able to play S4. However, the Elders became aware of this game and demanded that all local police forces halt any game in progress. Armed with guns created by the Fumbi dealers, the police went in and attempted to stop any S4 game. As explained before, even though someone could die, they would not die permanently thanks to the Esper. With the Esper field enclosing the game, after a player died, they could respawn anywhere within the field. However, amongst all the commotion players still had time to buy special clothes from the Fumbi dealers, changing their physical looks so as to not be recognized by the police. Also, the clothes were able to give bonuses to how strong they were, or how much Esper they could use on a skill. It was a truly creative sport that was unfortunately outlawed.