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The romantic comedy centers around Makoto Kisaragi, a 15-year-old girl whose "special ability" is her persecution complex. She was raised well but in relative obscurity compared to her big sister, a famous model. Despite her negative personality, Makoto vowed to become popular when she entered high school, but things did not turn out quite so well for her. One day, she meets Iriya, Mr. Popular in their class, and they become friends.
Tiny schoolgirl Chiiko develops a crush on older boy Saly and believes herself to be his girlfriend, although Saly is already involved in a love triangle with a girl called Tonko.
Yuuko, a teenage girl, wishes for nicer clothes to impress the boy she likes. Kaori is faced with family problems while feeling lonely. Michiyo's crush transferred schools without ever noticing her, leading her to question her tomboyish looks. These girls seemingly have nothing in common, until all three come into possession of a beautiful one-piece dress. But is the dress just an innocent gift, or is there something more sinister at play?