"Drowning Love" centers on Natsume Mochizuki, a teenage model who moves from Tokyo to the rural town of Kumogawa due to her father's work. Struggling to adjust to her new life, Natsume feels out of place in the quiet, close-knit community. Her life takes a dramatic turn when she encounters Koichiro Hase, a local boy with a mysterious and intense personality. Despite their contrasting backgrounds, the two form a complex and tumultuous relationship.

Koichiro, who is deeply connected to the natural environment of Kumogawa, harbors a fascination with water and often engages in risky behavior, such as diving into dangerous rivers. His enigmatic nature and unpredictable actions draw Natsume in, but their bond is fraught with tension and emotional volatility. As their relationship deepens, Natsume becomes increasingly entangled in Koichiro's world, grappling with her own identity and the pressures of her modeling career.

The narrative explores themes of love, self-discovery, and the clash between urban and rural lifestyles. Natsume's journey is marked by her struggle to reconcile her aspirations with her growing attachment to Koichiro and the simplicity of life in Kumogawa. Koichiro, on the other hand, is driven by a desire to escape the confines of his small-town existence, often resorting to reckless behavior as a form of rebellion.

Secondary characters, such as Natsume's family and classmates, provide additional layers to the story, highlighting the cultural and social dynamics of the town. The series delves into the complexities of adolescence, portraying the characters' emotional growth and the challenges they face in navigating their relationships and personal ambitions.

The plot is characterized by its emotional intensity and exploration of human vulnerability, with moments of both tenderness and conflict. The evolving dynamics between Natsume and Koichiro serve as the central focus, driving the narrative forward as they confront their fears, desires, and the consequences of their choices. "Drowning Love" offers a poignant and introspective portrayal of young love and the search for meaning in a rapidly changing world.