Hibari Oozora, the third eldest child of yakuza boss Ibari Oozora, lives with her father and three sisters after her mother's death. Assigned male at birth, Hibari consistently presents and lives as female outside the home, attending school as a girl and identifying as one of Ibari's daughters. Other characters, including her father and Kousaku Sakamoto, frequently misgender her, using male pronouns and derogatory terms like "pervert" or "crossdresser." Hibari often responds to these labels with sadness, defiance, or humor, sometimes reclaiming the term "pervert" to disarm it.

She exhibits confidence in her feminine identity, openly desiring physical transition and expressing envy toward other girls' development. Hibari meticulously maintains her presentation with stylish clothing and accessories. Her personality blends assertiveness, independence, charisma, academic strength, athletic skill, and popularity at school, where unaware peers view her as an idol. This contrasts with her behavior at home, influenced by her yakuza upbringing, where she displays impulsive aggression, readiness to wield weapons, and engages in physical confrontations – portrayed as inherent character traits, not masculinity.

Her central dynamic involves persistent romantic pursuit of Kousaku Sakamoto after he moves into their home, often through comedic advances. While some interactions involve non-consensual physical contact framed within the series' slapstick style, Kousaku knows her assigned gender from the start; his initial rejection stems from discomfort with this knowledge, not deception. Kousaku later develops genuine romantic feelings but struggles with societal expectations. Hibari remains devoted exclusively to him, rejecting other suitors regardless of their knowledge.

Family relationships are crucial. Her father, Ibari, disapproves of her gender expression, pressuring her toward masculine behavior and to inherit the yakuza group, efforts consistently thwarted by her resilience. Her youngest sister, Suzume, is fully supportive, affirming Hibari's identity without reservation. Hibari demonstrates protectiveness toward women's spaces, finding herself in situations like locker rooms or baths where her presence causes anxiety. She focuses on avoiding exposure; instances of breast-related envy highlight gender distress rather than sexual intent.

The narrative concludes without full resolution due to the manga's premature ending, leaving her relationship and gender journey incomplete. However, late-story elements hint at deeper exploration, introducing a transgender male character who discusses hormone replacement therapy, positioning them as counterparts. Coupled with Kousaku's gradual acceptance, this suggests an unresolved but evolving trajectory toward broader acknowledgment of her identity.