Yaya-chan is a very timid and naive highschool girl and constantly gets picked on. Her "friends" only use her to make themselves look cool but Yaya never does anything about it. One day though it just becomes to much and Yaya-chan passes out, but to awaken with a new personality. Her alternate persona "Nana-chan" is the exact opposite from her, strong, outgoing, cool. The only thing is that Yaya-chan doesn't remeber anything that happens after Nana-chan goes away.
In this volume Yaya is getting friendly with a boy in school, Moriyama, but her "friends" don't like her getting to close to boys because they think she's a "loser". How will Nana-chan take this situation and turn it on its head?