Upon reaching her second year of middle school, Fuuka undergoes a noticeable growth spurt, towering over her peers with a generous bosom. Dubbed 'Saipu' by her classmates due to her hairstyle resembling a cyclops, her once endearing admiration for her older brother, where she dreamt of marrying him as a child, now elicits discomfort from him as she insists on pursuing her childhood fantasies in her newfound maturity.