"Sleazy Daughter" centers on the life of Rina Takahashi, a high school student navigating the complexities of adolescence while grappling with her family's unconventional dynamics. Rina's mother, Yuko, is a former idol turned nightclub hostess, whose past fame and current lifestyle cast a long shadow over Rina's identity. The series explores Rina's struggle to reconcile her desire for a normal life with the pressures of her mother's notoriety and the expectations of her peers.

The narrative unfolds as Rina begins to uncover secrets about her mother's past, including a scandal that led to Yuko's fall from grace. These revelations force Rina to confront her own perceptions of morality, ambition, and familial loyalty. Parallel to this, Rina forms a tentative friendship with Kenta, a classmate who harbors his own insecurities and aspirations. Their relationship becomes a focal point for exploring themes of trust, self-discovery, and the impact of societal judgment.

As the story progresses, Rina's interactions with her mother grow increasingly strained, particularly when Yuko's decisions begin to directly affect Rina's life at school. The series delves into the emotional toll of living under the scrutiny of others, as well as the challenges of forging one's identity in the shadow of a parent's legacy. Supporting characters, such as Rina's estranged father and her sharp-tongued best friend, Aya, add depth to the narrative, offering contrasting perspectives on family and personal growth.

The plot is driven by a series of escalating conflicts, both internal and external, as Rina attempts to carve out her own path while navigating the fallout of her mother's choices. The series balances moments of introspection with dramatic confrontations, culminating in a resolution that underscores the complexity of familial bonds and the resilience required to overcome societal stigma. Through its exploration of identity, ambition, and the consequences of past actions, "Sleazy Daughter" presents a nuanced portrayal of adolescence and the enduring influence of family.