The Summer of Kikujiro was a Japanese novel by Keigo Higashino. The novel was developed from the perspective of the protagonist, Kikujiro. Through the narration of some details in his daily life, it showed the pain and warmth in the depths of an ordinary person's heart. The narrative feature of the novel is the emotional description and the psychological changes of the characters. Through Kikujiro's perspective, the author showed his inner contradictions and pain, and also described his interactions with his friends and family so that the readers could feel his emotional changes. The author also described the personalities and appearances of different characters through delicate descriptions so that readers could better understand the inner world of each character. The narrative technique of this novel was also very unique. The author used a first-person narrative to let the protagonist Kikujiro face the readers directly. This way of narration allows the readers to have a deeper understanding of the protagonist's inner world and also increases the appeal and realism of the novel. In addition, the author also used a non-linear narrative to interweave the plot and timeline of the novel to make the story more complicated and deep. The Summer of Kikujiro was a novel with delicate emotions, unique narration, and full of appeal. Through the perspective of the protagonist, Kikujiro, the author shows the pain and warmth in the depths of an ordinary person's heart, allowing the readers to understand human nature and emotions more deeply.