"38°C" is a manga series that explores themes of love, relationships, and personal growth through the lens of its central characters. The story revolves around a young woman named Aoi, who works as a nurse, and her boyfriend, Shintaro, a chef. Their relationship is tested by the challenges of balancing their demanding careers with their personal lives. Aoi’s dedication to her patients often leaves her emotionally drained, while Shintaro’s passion for cooking drives him to prioritize his work. The narrative delves into their struggles to maintain intimacy and communication amidst their busy schedules, highlighting the pressures of modern life on romantic partnerships.

The title, "38°C," symbolizes the delicate balance of emotions and physical closeness in their relationship, as 38 degrees Celsius is often associated with a mild fever—a state of heightened sensitivity and vulnerability. Throughout the series, Aoi and Shintaro navigate misunderstandings, insecurities, and external pressures, including the expectations of their families and colleagues. Their journey is marked by moments of tenderness, conflict, and reconciliation, as they learn to support each other while pursuing their individual dreams.

Secondary characters, such as Aoi’s fellow nurses and Shintaro’s coworkers, provide additional layers to the story, offering perspectives on love and career that contrast or complement the central relationship. The manga also addresses broader themes of self-discovery and the importance of mutual respect in sustaining a healthy partnership. By focusing on the everyday struggles and triumphs of its characters, "38°C" presents a grounded and relatable portrayal of love in the face of life’s complexities.