October 31st, 2012 – 4 girls had gone to a supposed "sorceror," hoping this sorceror would help them. 

Each girl had wanted to be one of the others, so they called upon the sorceror to switch their bodies.

The sorceror warned that they would not be able to switch back, without her help. And even then, they'd have to wait until the next time Comet 3X6 was seen again. They went through with it. 

October 6th, 2015 – Just 3 months after the girls had switched bodies, they had missed their old bodies. But alas, Comet 3X6's next sighting would be on November 3rd, 2015. They had to be each other for 3 years. Now, they have to find the sorceror. And to find the sorceror, the girls have to embark on a long, mysterious journey.

The Cast

Kang Seul-gi (강슬기) was the supposedly uptight valedictorian, according to the so-called popular kids. This was not true. Except, of course, the part about being valedictorian. After graduating from middle school and elementary school as valedictorian, Seulgi's life goal was to be high school valedictorian. She was an A-average, "miss-goody-two-shoes," honor student. But because of this, people think she's strict and doesn't know how to have fun. She wishes to be able to show people the real her isn't as strict as they perceived. She wants to be known as more than the "brains." Seulgi → Wendy

"Wendy" Son Seung-wan ("웬디" 손승완) was the class clown. Everywhere, Wendy made jokes. This of course, got her into trouble from time to time. Wendy didn't mind though, as long as people smiled. But with all the pressure of being the loud, funny person, she wishes to have a break. To not be expected to lead groups and shout out opinions. Wendy → Irene

"Joy" Park Soo-young ("조이" 박수영) is the head cheerleader. Known for her perkiness, she was nicknamed "Joy." However, despite being fairly popular, Joy has had her share of jealous haters. Some believe that since the young girl is a super happy person, Joy has no brains to speak for herself. Joy wants to prove people wrong, but she isn't exactly sure how. Joy →Seulgi

"Irene" Bae Joo-hyun ("아이린" 배주현) learnt that it is best to stay under the radar. At least in her opinion. She was a very shy girl. She was the one who sat in the back of the classroom, and never raised her hand. She was quite satisfied with her way of life. But of course, she did always wonder what it would be like to have the spotlight all to herself. Like Seulgi, people believed Irene was snobby and uptight. She wants to change her image, and be one of those happy-go-lucky people, but how exactly can she go from shy, boring-ish Irene to happy-outgoing Irene? Irene → Joy 

"Yeri" Bae Ye-rim ("예리" 배예림) is Irene's kid sister. She is quite the opposite of her sister; loud, outgoing, popular, loved the spotlight. Irene tends to get jealous of her from time to time, whether it be because she found it easy to be popular, or because their parents so obviously favored Yeri. Nevertheless, Irene loves her with all her heart, and is very protective of her. Yeri, on the other hand,  idolizes her sister, despite having parallel personalities.