Yaya Higuchi is an admirer of visual kei musicians and gothic lolita fashion. As a child, she dreamed of growing up to become a great singer. However, she now conceals her passion six days a week, fearing ridicule from her peers or her overly strict father. Only on Sundays can she freely express herself among like-minded teens in Harajuku. Even without revealing her secret hobbies, Yaya is mistreated by Seri and Moe, two mean girls whom she considers friends. Despite her efforts to remain optimistic, Yaya is painfully aware that no one at school speaks to her except her bullies and an almost offensively straightforward male classmate named Moriyama. When a fierce, no-nonsense girl named Nana begins handling Yaya's troubles—paying back Seri and Moe for their cruel pranks and kicking predatory men who approach Yaya in the street—it seems too good to be true. Moriyama encounters Nana more than once, and as he sees Yaya in class every day, he gradually begins to suspect that these two vastly different girls are the same person!