"Summer Ghost" is a manga that explores themes of loss, grief, and the search for meaning through a supernatural lens. The narrative centers on three teenagers—Tomoya, Aoi, and Ryo—who are drawn together by their shared fascination with the urban legend of the "Summer Ghost," a spirit said to appear only during the summer months. Each character is grappling with personal struggles: Tomoya is burdened by the weight of academic expectations and a sense of purposelessness, Aoi is haunted by the trauma of a tragic accident, and Ryo is confronting the terminal illness that threatens his future.

The trio decides to summon the Summer Ghost by performing a ritual involving fireworks and a specific location. To their surprise, the ghost, named Ayane, appears. Ayane reveals that she is a young woman who died by suicide and is now trapped in a liminal state, unable to move on. She explains that her unfinished business ties her to the living world, and she seeks closure. As the story progresses, the three protagonists form a bond with Ayane, each finding solace and understanding through their interactions with her.

The narrative delves into the emotional landscapes of the characters, exploring how they confront their fears, regrets, and unresolved feelings. Ayane’s presence serves as a catalyst for their personal growth, prompting them to reflect on their lives and the choices they have made. The story is punctuated by moments of introspection and quiet melancholy, as well as fleeting instances of hope and connection.

As the summer draws to a close, the characters must come to terms with the inevitability of Ayane’s departure and the transient nature of their shared experiences. The manga concludes with a poignant resolution, emphasizing the importance of cherishing the present and finding meaning in the face of life’s uncertainties. Through its exploration of grief and healing, "Summer Ghost" offers a contemplative and emotionally resonant narrative that lingers with the reader.