"Netsu o Kurawaba, Haha Made mo" is a manga series that explores themes of family, sacrifice, and the complexities of human relationships. The narrative centers on a young man named Haruto, who lives with his mother, Yuko, in a modest household. Their lives take a dramatic turn when Haruto begins to experience strange, debilitating fevers that defy medical explanation. As his condition worsens, Yuko becomes increasingly desperate to find a cure, leading her to make increasingly extreme and morally ambiguous decisions.

The story delves into the psychological and emotional toll of Haruto's illness on both him and Yuko. Haruto's fevers are not merely physical; they are tied to a deeper, supernatural phenomenon that gradually unravels as the plot progresses. Yuko's maternal instincts drive her to uncover the truth behind her son's condition, even as it becomes clear that the solution may come at a great personal cost. The relationship between mother and son is tested as secrets from their past are revealed, shedding light on the origins of Haruto's affliction.

Supporting characters, including a mysterious doctor and a childhood friend of Haruto's, play pivotal roles in the unfolding drama. The doctor, who specializes in rare diseases, becomes a key figure in Yuko's quest for answers, while Haruto's friend provides emotional support and a connection to his life before the illness. The narrative weaves together elements of mystery, horror, and family drama, creating a tense and emotionally charged atmosphere.

As the story progresses, the boundaries between reality and the supernatural blur, leading to a climactic revelation that ties together the threads of Haruto's illness, Yuko's sacrifices, and the hidden truths of their family history. The manga maintains a focus on the emotional core of its characters, exploring themes of love, guilt, and the lengths to which a parent will go to protect their child. The resolution of the story leaves a lasting impact, emphasizing the enduring bond between mother and son despite the trials they face.