Maeng Se-na, a top star criminal lawyer who has been a fangirl for fifteen years, tries to prove her favorite idol’s innocence, who is suspected of murder.

A female student is a social misfit at her high school. She becomes a manager in the anonymous community app Social Butterfly Time. Through this, she learns all the secrets of her classmates. She joins a group in Social Butterfly that she desperately wants to become involved with.

Ji-o's luck runs out when she gets injured before the tryouts for the national taekwondo team. In the middle of facing what seems to be the biggest crisis of her life, she meets Gyeol, a mysterious boy who changes her life forever. He's the definition of a bad boy with a good heart, and she finds herself unable to resist his charms. However, she might be playing with fire as he's someone who's involved with the wrong crowd. Is falling for Gyeol worth the risk?