During their middle school years, Ayumu Kamei and Runa Takishima were constantly at odds, even though Ayumu was older. Runa's endless teasing and pranks left Ayumu on the losing end. Now in high school, Ayumu is determined to earn Runa's respect, but Runa still has the upper hand with her charming wit. Ayumu falls for Runa's tricks every time, but she's oblivious to Runa's real intentions. Ayumu will need to discover Runa's weakness to win, but the truth is, her own vulnerability is Runa. The volume also includes a one-shot pilot called "Tsuki no Okinimesu mama."
