In this universe, there are 3 Realms : The Light World, The World and The Dark World.

The Light World is situated at a very high sky city in the clouds. It is ruled by the one true leader known as the Emperor. Under him, there are many Gods and Semi-Gods working to protect the 3 Realms. 

The Gods are of 3 levels : Blue, Yellow, and Red. Under them, their trainees, Semi-gods are working. Their duty is to arrest the monsters who are destroying and making mess on the normal human World.

There are thousands of rules in the Light World and they have to follow them no matter what. If someone breaks the rule, he will be sent down to the normal human World for years as a punishment. It is known as "The Sending".

Even if the criminal God is returned back to the Light World, there will be the Curse remained on his body and he will not be able to use his full power again. So, every God is afraid of The Sending punishment.

The most strangest rule of the Light World is the Forbidden Rule : Never in a relationship with Human.

Under the Light World, there is normal human World exists. They never know about the other two worlds as both Gods and Demons decided to stay low-key. They all understand that the humans are curious with everything and they will try to get into their ways if they find out about them.

The only powerful people on the World are the Yin-Yangs. They are duo workers who are spreading around the World and balancing the Fate. People can't see them and their task here is to make sure that the Light and Dark are in balance between the three worlds so that the Destroyer will never appear.

Under the World, there is the Dark World which is ruled by the 4 Demon Kings. They are known as the Masters. Their powers are as strong as the Emperor, ruling the Hell, the Ocean, the Nature and the Soul.

In this world, there is no rule. Only the strongest can become the Masters. They don't mind with each other's business and they do what they like. All the Demons and Monsters have to obey the Masters and this is the only rule.

So, they often invade into the human World and make mess, causing Gods to come down and take care of the problems. 
 

The 3 Realms are living in peace for 1000 years when this story starts. But, unlucky to them, there is a legend about a Demon known as "The Destroyer". He is the most powerful being in this 3 Realms and he appears every 1000 years.

To stop him from destroying the 3 Realms and killing everyone, the warriors from both Light and Dark World have to unite to fight him. 
 

Characters

The Light World

The Emperor- Son Seungwan
- She has been the Emperor for 1000 years after the last battle with the Destroyer
- She is the one who used the BloodyMoon Saber to slay the Destroyer, that's why she became the Emperor 
​​​​​​- But she has been feeling guilty for her actions all day and night as she had to lose all her friends at that battle.

The Princess - Park Jihyo
- Blue level God
- the next successor of the Light World
- weapon - the Lightening as the Emperor gave her to use

Chou Tzuyu
- Yellow level God
- the best at books
- not talk too much as she has been living in the Past 100 years ago
- always playing her Guqin which is also her weapon

Kim Dahyun
- Yellow level God
- the best at martial arts
- chosen for the superior warrior
- weapon - the double bladed saber

Miyawaki Sakura
- Yellow level God
- works at the Communication Tower
- she is super pretty and there are many Gods after her
- but she only gives favour for the two Semi-gods, well, indeed, she loves only one of them
- doesn't have a weapon but she has a flying pen following after her and taking down notes if she wishes

Kim Minju
- Red level God
- she is working under Sakura
- unlucky to her, she is blind and her eyes are tied with a silvery silk cloth
- she is a nice and kind-hearted God who is always ready to help you with anything
- and of course, she has no weapon at all

Kang Hyewon
- Semi-god
- she will be a God after the final test
- her partner is Lee Chaeyeon
- a prankster but everyone loves her for her cheerful vibes
- has a huge crush on Sakura
- Weapon - two daggers which can be connected and turned into double-ended sword

Lee Chaeyeon
- Semi-god
- she will be a God after the final test
- her partner is Kang Hyewon
- a kind and cool one so everyone wants to date her
- Sakura has a huge crush on her, she knows but she doesn't care
- weapon - Bow and Arrows

The World

Kwon Eunbi
- the human girl
- she met with KangChaeng on their mission and involves in the God-Demon things by accident
- lives with her uncle and aunty at a big mansion outside the Town

Son Chaeyoung
- a punished God who is on her The Sending Punishment
- super kind and positive thinking one
- she has been on the World for 100 years
- she never regrets for what she did
- she is almost like a human as she can't use her powers
- she has the Curse on her right wrist in the form of a black bracelet
- if she tries to do something bad, it will hurt her... badly
- she is now collecting Good Deeds so that she can go back to the Light World if it reaches 100,000,000.

Nayeon & Jeongyeon
- the Yin-Yang
- they have been protecting this Town for 300 years
- they are on a mission of balancing the Fate
- friends with Chaeyoung as they took care of her when she was kicked off from the sky

The Dark World

Ocean Master - Yuta
- he is the King of Dark Water living in the centre of 7 Oceans
- he enjoys killing people by making holes in their ships
- he called it 'Playing' 
- no one dares to mess with him because he owns the infamous Memory River in which all lost memories of dead people are stored
- he is in the form of a man of 25 with his Navy armor and manly handsome features
- weapon - the Golden Trident

Hell Master - Momo
- she is the King of underworld living in Hell
- she is ruling the Hell with her Demon Dog called Boo
- has no mercy
- currently taking care of a Sleeping Beauty who she has been kept in a glass coffin for 100 years
- she is in the form of a y beautiful woman with a smirk wearing Raven Silk long dress and a bob-cut black hair
- weapon - the Flaming Whip

Soul Master - Shoūtaru
- he is the King of the Dead
- he can control Monsters and make them do as he wants 
- he loves to go around the 2 Realms as he has no home
- he is in the form of a teenager wearing Red and Black causal outfit
- weapon - none

Nature Master - Mina
- she is the King of Nature 
- she can control trees and animals
- she is a mysterious person and everyone is scared of her for this
- she is in the form of an elegant lady with Ash Grey hair wearing a silvery white dress, the only color on her body is the red string on her right middle finger which she tied in a ribbon
- her symbol is glowing butterfly as she changes herself into thousands of butterflies whenever she travels
- she has been looking for someone
- weapon - her belt which will turn into a sword when she wants

The Sleeping Beauty - Minatozaki Sana
- the mysterious girl
- she fell down into the Hell Abyss 100 years ago
- Boo found her and Momo had to save her as her dog wanted
- she has been sleeping for years
- Momo knows that she is a God but the Dark Aura is strong against her and to her surprise, that girl is turning into a Demon day by day while sleeping in peace

All of them are busy with their own lives already. But the time has come and the Destroyer is waking up again to destroy all 3 Realms. Will they be able to protect their Worlds and their loved ones?