Jennie Kim lost her mother several years before in a tragic car accident, leaving her only able to cherish the few memories that she can barely remember of her. She has trouble getting over the past memories and is still dwelling upon them, living with the hatred of the changes that took course after the event with a new stepmother and a new stepsister.

And Jennie only calls her stepsister's name out of bitterness,

"Rosé."

But maybe the version of the accident that Jennie can remember isn't exactly what took place on that fateful day.
A mysterious girl, who somehow attracts Jennie's attention in an unexplainable way, appears and slowly shows her that fact.

And that things may not be the way that Jennie saw it as.
Her name is "Kim Jisoo."

Contains curses and swears, demeaning, and other typical high school customs.
This is fiction; while characters may be savage and mean, they're probably not like this in reality.