People always think that Angels are always the good one; they smile, they are polite, and are kind-hearted, while the Devils are always the bad one; they are cold, impolite and annoying. But what if the truth is actually different?

A group of Angels are sent to Earth to prevent humans from making anymore sins. And a group of Devils are sent to Earth to kill them. Will they have their endings with one of them dead? Or will they fall for one another instead? Will they betray their God or will they kill their own feelings and continue on their mission to kill one another?

○ The Angels:

~ Kwon Taeyeon (Kim Taeyeon): A cold and cool Angel. She is the eldest and is the wisest in making decisions, which earns her the leader title. She is closest to Yuri, her step-sister and Tiffany, her best friend. She is the fastest. She has the power to sense one's feelings. She also has the power of Wind and Mind Manipulation. 

~ Jung Jessica: A cold and cool Angel. She has a shy personality, but she hides it with her cold appearance, earning herself the nickname as 'The Ice Princess' for her cold attitude, which is why she is feared by many. She is closest to Yoona, the visual and Seohyun, the youngest. She has the power of Ice.

~ Lee Sunny: A cold and cool Angel. She is often refer as the 'Aegyo Queen' due to her lots of aegyos she shows only to her besties whom unfortunately despise it. She is the shortest out of the nine and she prefers to be called Sunny rather than her real name, Soonkyu. She has the power of thunder and also the power to teleport to any location she desires.

~ Tiffany Hwang: A cold and cool Angel. She has the loveliest eye-smile and the most perfect jaw-line anyone can ever have. She is a playful Angel who loves to prank others, but ends up getting prank instead. She is closest to Taeyeon and Yuri. She has the power of Earth and she can manipulate humans feelings into any feelings she wants them to feel. 

~ Kim Hyoyeon: A cold and cool Angel. She dances as her hobby, and she loves pranking her best friends. She has a cold outer appearance, which is why she is feared by many, although she actually has a kind-hearted heart. She is closest to Sunny and Sooyoung. She has the power of Thunder and is able to produce all kinds of metals.

~ Kwon Yuri: A cold and cool Angel-Devil. She is the favorite daughter and angel of the gods. She is closest to Taeyeon and Tiffany. Being the only Angel-Devil born, she has many unrevealed hidden powers, although no one, including herself knows that she is an Angel-Devil born, except for her parents. She has the power of Light and Nullification. She is the strongest in power. She can also read one's mind and do Telekinesis.

~ Choi Sooyoung: A cold and cool Angel. She is the most hot-tempered Angel. She is both a shikskin and prankster in the team. She loves to eat, but never gets fat. She is closest to Sunny and Hyoyeon. She has the power of Fire elements and Super-Strength power, making herself the strongest physically. 

~ Im Yoona: A cold and cool Angel. She is another prankster who loves to eat. She is often called as the second shikskin due to her big appetite for food, although she never gets fat and is consider the slimmest no matter how much she eats. She is closest to Jessica and Seohyun. She has the power of Electricity and Invincibility. 

~ Seo Juhyun: A cold and cool Angel. She is the smartest, healthiest, and the most innocent angel anyone can ever meet. She is too innocent that her friends are often worried about her. She is the youngest in the team. She has the power of Water and Healing; and is able to read the important things that will happen in the future. She is also able to find out one's power just by looking at them. 

Together, the nine of them are often called as "Girls' Generation". They are the strongest in both powers and physically. They are also the most respected and popular team in the Angels' world; one of the main reason having the daughters of the gods in the team. They are also known to be faithful to one another, since they are often known for their "Soshi-Bond".

○ The Devils:

~ Park Jungsoo: A cold yet warm-hearted Devil. He is the eldest and is in charge of ordering s around. He is also in charge of making the final decision, earning himself the leader title. He has the power of Empathy(the ability to understand and share the feelings of another) and Divination(the practice of seeking knowledge of the future or the unknown ).

~ Kim Heechul: A cool, funny yet warm-hearted Devil. He's the mood maker of the group. He likes to play around, but he can be serious too. He is usually in charge of making decisions alongside Jungsoo. He has the power of Chronokenisis(Control Time).

~ Kim Youngwoon: A cool, warm-hearted Devil that loves to prank others. He is considered one of the most mature in the team. He usually helps s by giving them good advices. He is an honest and hot-tempered devil. Clairvoyance/Vision(the ability to see the unknown) is his power.

~ Lee Hyukjae: A cool and warm-hearted Devil. He is considered as a prankster alongside Heechul and Kangin. He will always there for s, which is why he is the most helpful one. He is closest to Donghae. He does dancing as his hobby. He has the power of pshycometry/Touch-know(Read anyone and/or anything's past and/or future by using senses) and remote viewing(the practice of seeking impressions about a distant or unseen target using subjective means, in particular, extrasensory perception (ESP) or "sensing with mind").

~ Lee Donghae: A cold and cool Devil. He is the only son of Lucifer, which is why he is the most cruel in the team, as he is raised and taught to be merciless. He can sometimes be cold, merciless and cool, but he can also be all shy and quiet at times. Although he will soon be the next Lucifer, he follows his leader's order well. He has the power to control Darkness and he does Telepathy. His other hidden powers are still unknown.

~ Lee Sungmin: A cool and sweet-hearted Devil. Rather than being the most loud one, he is the most quiet in the team and he listen to the other's orders well. He like to listen to the others due to his power are clairaudience. Besides having the hearing power, he also owns the shapeshifting power.

~ Choi Siwon: A cool yet warm-hearted Devil. He is one of the most sociable in the team, and is calmest of all. He does all kinds of sports as his hobbies. He is considered as the visual of the group, due to his handsome face. He has Aura Reading as his power.

~ Zhoumi: A cool and warm-hearted Devil. He is closest to Siwon and he will usually sings with Kyuhyun as his hobby. He is considered the smartest in the team, and he sometimes help Jungsoo and Heechul to make the right decision. He has the power of Clairaudience/Hearing(The ability to internally hear information that is passed from the dead). 

~ Cho Kyuhyun: A cool and cold Devil. He is second when it comes to the coldest and merciless in the team. He often does something that makes others speechless. Due to his personality, he is able to sometimes make the atmosphere awkward. He loves to prank others, but ends up being prank instead. He have the power of Extra Sensory Perception(the ability to gather information without the use of the 5 senses (hence it is also sometimes called sixth sense) and Spirit Seeing.

Together, they are often referred as "Super Junior", the most well known and respected group of Devils who never fails to amaze the king of Devil himself since they always done their mission perfectly and have never fail in any. Although they are a group of devil, they have a very loyal friendship. They vow to never betray one another. For anything. For eternity.