It tells the story of Nina Kamiyama, a high school girl hiding her past as Karen Amamiya, a former idol who left her group after a violent attack, as she faces the threat of her assailant discovering her identity and striking again.

However, during a handshake event, Karen Amamiya is attacked by a hooded man, prompting her to leave the group and disappear from public view.

In a separate storyline, Nina Kamiyama rejects traditional femininity, sporting short hair and male school uniform.

Following an assault on a nearby schoolgirl, the schools in the area cancel girls' after-school activities, urging them to walk home in groups.

She also praised the depiction of idol culture in the series and the psychological thriller elements, which she compared to Perfect Blue and Oshi no Ko.