"Alice in the Country of Hearts: Junk Box" is a manga series that expands on the world and characters introduced in the original "Alice in the Country of Hearts" series. The story is set in a fantastical, dreamlike version of Wonderland, where the protagonist, Alice Liddell, finds herself transported after following a mysterious white rabbit. This version of Wonderland is populated by anthropomorphic characters, each representing a playing card or a figure from the original Alice in Wonderland tales, but with darker, more complex personalities and backstories.

In "Junk Box," the narrative delves deeper into the relationships and dynamics between Alice and the inhabitants of Wonderland. The series explores the concept of "junk," which refers to discarded or forgotten memories and emotions. These "junk" pieces are collected and stored in a box, symbolizing the unresolved feelings and past experiences of the characters. The story examines how these memories influence the characters' actions and relationships, particularly their interactions with Alice.

The main characters include Alice, who remains the central figure navigating this strange world. The residents of Wonderland, such as Blood Dupre (the Mad Hatter), Boris Airay (the Cheshire Cat), and Julius Monrey (the Clockmaker), play significant roles. Each character has a unique connection to Alice, and their interactions often reveal deeper layers of their personalities and histories. The series also introduces new characters and scenarios that further complicate Alice's journey, adding to the intricate web of relationships and emotions.

The plot of "Junk Box" is episodic, with each chapter focusing on different characters and their "junk" memories. These vignettes provide insight into the characters' motivations and the underlying tensions within Wonderland. The narrative often shifts between lighthearted, whimsical moments and darker, more introspective themes, reflecting the duality of the world and its inhabitants.

Throughout the series, Alice's presence acts as a catalyst for change, prompting the characters to confront their pasts and the emotions they have buried. The exploration of memory, identity, and emotional baggage is central to the story, making "Junk Box" a compelling addition to the "Alice in the Country of Hearts" universe. The series maintains a balance between fantasy and psychological depth, offering readers a nuanced portrayal of its characters and their struggles.