[a/n:I need to lay some common knowledge first before I begin the story. There are terms that are needed to be defined before proceeding to the story main as to save ourselves lengthy explanations in the story itself and allowing me to manipulate the story plot without worrying over the details]

Timeline: The story is set in a timeline very much like ours though the fact that people born with supernatural abilities is a norm. The main location is Seoul, Korea and the year is 2013. 

Name of places that may became significant in the story: 

Citadel - a large floating island located at the Exosphere that serves as the abode of elite casters. 
SM Insitute - an institution that trains and produces casters with elite and harsh training regime.
Hubblescope - a secret place where Exo members met during emergency summons where they shall receive orders and such.
Blackscream manor - the old hiding place of ANTI-X.O, a formerly large syndicate whose existence was erased much to the effort of the Exo.

Certain terminologies that may come in handy:

Casters - are individuals that possess a supernatural talent that is rare for others.

Cast -the ability casters are inborn with. 

Exoplanet - the united and only nation of the casters all over the world. 

Exo - a special police force that serves directly under the Prime Supremos, also known as the Guardians. Now, they are exalted as heroes who defeated the large crimincal syndicate ANTI-XO

Aristocasters - are elite casters who either have a very large rank or was born in a 3 generation caster family. They are the object of everyone's admiration. 

Prime Supremos - the head of the Exoplanet. An unknown entity who is wise and knowing. No one has ever seen him before. Exo only heard his voice.
 

Ranking/ hierarchy system of Exoplanet:

C rank - the lowest rank. They can use their cast for daily needs and their cast are usely normal. Depending on the amount of time and strength they can withold their cast they are graded in 3,2,1 with one as the highes grade. They are often called as Murk.
B rank - the middle rank. They can use their cast as much as they want but their powers are limited. The cast in the rank varies and they are graded at with how strong their cast are and according to its type. Same with the Murk, the grades are 3,2,1 with 1 as the highest. 
A rank - the elites. They are a few that are granted access to the Citadel. They have rare cast which was the only qualification to enter the rank. They are also graded according with the power of their cast and its rarity. 
S rank - the heroes. The special rank that can be achieved with having all the following requirements: rare cast, powerful cast, efficient cast, and absolute control over their cast, covered. There are a few groups that have this cast and they are elite police forces of the Exo planet, they are namely: EXO, SJ. SNSD, DBSK, SHINEE, and F(x). 

Exo Profile:

Squad K: code:Kaiser
Leader: Kim Joonmyeon
codename: Suho
Rank: S
Power: water

Vice-captain: Do Kyungsoo
codename: D.O

Rank: S
Power: Earth(Strength)

Members: 

Byun Baekhyun
codename: Bacon
Rank: S
Power: Light
 

Park Chanyeol
codename: Derp

Rank: S

Power: Fire

Kim Jongin
codename: Kai
Rank: S
Power: Teleportation

Oh Sehun
codename: Rainbow
Rank: S
Power: Wind


Squad M; code: Melekh

Leader: Wu Yifan
codename: Kris
Rank: S
Power: Flight

Vice-captain: Lu Han
codename: Luhan
Rank: S

Power: Telekinesis

Members:

Huang Zitao
codename: Tao
Rank: S
Power: Time control

Zhang Yi Xing
codename: Lay
Rank: S
Power: Healing

Kim Jongdae
codename: Chen
Rank: S
Power: Electricity

Kim Minseok (M.I.A)
codename: Baozi
Rank: S
Power: Nullification

The symbols should be in the picture.