This is the story of a group of girls from different places chasing their dreams in South Korea. They climbed up step by step from trainees to reach the top, but they constantly experienced various setbacks and slanders. Where will the girl group go in the end? Will they disband or reach the top?
It is said that there is also a mermaid princess who pretends to be a mortal in the girl group. What is her purpose? Will it have any negative impact on the girl group?
The emotional lives of the girls are also exciting in their own way, including online dating, pseudo-childhood sweethearts, happy enemies, polyamorous relationships, and long-time best friends finally become love rivals who fall in love and kill each other.
But having said that, the mermaid princess actually wanted to date one of her group members in the first place. Is this really good?