Chitose Fujinomiya starts as a wealthy heiress at the elite Tokai no Gakuen. Her father's death exposes crippling family debts, stripping her of fortune and status. Expelled from the school and abandoned by friends, the orphaned Chitose plunges into destitution. She relocates to the dilapidated Inaka no Chugakko (Country Jr. High School), where farm animals attend alongside human students. Her sole remaining possession is Gyopi, a rare pink goldfish and valuable memento from her father.

The family's corrupt lawyer, Tanakayama, schemes to steal the valuable Gyopi. Chitose's new classmates, especially the eccentric Wapiko, foil this plot. During the confrontation, Tanakayama drops a key revealing Chitose's hidden inheritance—stocks, deeds, and financial documents restoring her wealth. Rather than return to her old elite school, Chitose uses the funds to purchase and renovate the rural institution, renaming it Shin-Inaka no Chugakko (New Country Jr. High School). She installs herself as both student council president and school owner, aiming to transform it into a refined academy rivaling Tokai no Gakuen.

Chitose remains defined by extreme snobbery, vanity, and obsession with high-society norms. She persistently tries to impose "proper" customs like tea ceremonies or strict dress codes on the free-spirited students. These efforts consistently backfire due to student resistance and her own lack of practical understanding. Her arrogance manifests comically, such as refusing to escape a burning building because running is unladylike.

She maintains a bitter rivalry with Yurika Sugadaira, her successor at Tokai no Gakuen. Though she initially scorns her rural classmates—especially Wapiko—she gradually develops a grudging reliance on them. Her relationship with the delinquent Aoi fluctuates between antagonism and romantic tension. Interactions with the pragmatic Shuichi Kitada often highlight her detachment from reality. She exhibits minimal character growth, repeatedly falling into patterns of selfishness, scheming, and dramatic outbursts. These actions often result in karmic consequences like being trampled by cows or outwitted by animals.

Throughout the series, she serves as a source of comedy through exaggerated snobbery, futile control attempts, and vulnerability to slapstick mishaps. Her ownership of Gyopi remains a recurring element, with the goldfish occasionally displaying fantastical abilities like flight. Despite occasional moments of camaraderie with the Shin-Inaka students, her core traits of entitlement and stubbornness persist unchanged.