"Koi wa Ameagari no You ni" centers on Akira Tachibana, a reserved and disciplined high school student who excels in track and field but suffers a career-ending injury. Struggling with her identity and purpose after losing her athletic passion, she begins working part-time at a family restaurant. There, she develops an unexpected infatuation with her manager, Masami Kondō, a 45-year-old divorced man with a gentle demeanor but a lack of ambition. Kondō, once a promising writer, now leads a mundane life, content with his modest role at the restaurant.

The narrative explores the complexities of their relationship, delving into themes of unrequited love, self-discovery, and societal expectations. Akira’s feelings for Kondō are initially one-sided, as he remains oblivious to her emotions, viewing her as a diligent employee and a young girl in need of guidance. As the story progresses, Akira’s persistence forces Kondō to confront his own insecurities and regrets, while she grapples with the intensity of her emotions and the societal stigma surrounding their age difference.

Supporting characters, such as Akira’s classmates and coworkers, provide additional layers to the story, highlighting the contrast between youthful idealism and the realities of adulthood. The series portrays the quiet, everyday moments of life, emphasizing the emotional weight of small gestures and unspoken feelings. Through its nuanced character dynamics and introspective tone, "Koi wa Ameagari no You ni" examines the fragility of human connections and the courage required to pursue one’s desires, regardless of societal norms.