Momoko Futo is a typical high school student going about her daily activities. Her life is anything but routine, despite her laid-back and pleasant demeanor, since her eccentricities and clumsiness never fail to brighten her days. Her two greatest pals are constantly by her side: the adorable and innocent Mayumi Furui and the calm and collected Shibumi Shibusawa. Joshikausei tries to describe the humorous hijinks these girls get up to using the expressive noises and motions they produce, without any spoken conversation or narration.