"Ushiro no Shindere-san" is a supernatural comedy manga that revolves around the life of a high school student named Souichirou Nagi, who becomes haunted by a ghost named Shiori Saginomiya. Shiori, a former student of the same school, died under mysterious circumstances and now lingers in the mortal world. Unlike typical ghost stories, Shiori is not a malevolent spirit but rather a cheerful and mischievous presence who develops a crush on Souichirou. Her ghostly antics often lead to humorous and awkward situations, as she tries to win his affection despite being invisible and intangible to everyone else.

Souichirou, initially unsettled by Shiori's presence, gradually becomes accustomed to her company. The dynamic between the two forms the core of the narrative, blending lighthearted comedy with moments of emotional depth. Shiori's inability to interact with the physical world creates a bittersweet undertone, as her feelings for Souichirou are complicated by her ghostly state. The story explores themes of unrequited love, the transient nature of life, and the lingering impact of unresolved emotions.

Supporting characters include Souichirou's classmates and friends, who remain unaware of Shiori's existence. Their interactions with Souichirou provide additional comedic and dramatic elements, often contrasting with the supernatural aspects of the story. The manga occasionally delves into Shiori's past, revealing fragments of her life and the events leading to her death, which adds layers to her character and motivations.

The tone of the series balances humor and melancholy, with Shiori's playful personality and Souichirou's grounded demeanor creating a compelling dynamic. The narrative avoids heavy drama, instead focusing on the everyday challenges and absurdities of a high school student living with a ghost. The manga's episodic structure allows for a mix of standalone comedic scenarios and gradual character development, ensuring a steady progression of the central relationship.

"Ushiro no Shindere-san" stands out for its unique premise and the interplay between its supernatural and mundane elements. The story maintains a consistent focus on the evolving bond between Souichirou and Shiori, offering a blend of humor, romance, and subtle introspection. The manga's exploration of life, death, and the connections that transcend them provides a distinctive take on the supernatural genre, making it a memorable and engaging read.