"When They Cry - Rei" is a five-episode OVA series that serves as a continuation and epilogue to the original "Higurashi no Naku Koro ni" and "Higurashi no Naku Koro ni Kai." The series revisits the characters and setting of Hinamizawa, a rural village plagued by mysterious events and a curse tied to the local deity, Oyashiro-sama. The narrative is divided into distinct arcs, each exploring different facets of the characters' lives and the overarching mysteries of the series.

The first arc, "Saikoroshi-hen," focuses on Rika Furude, who has survived the endless loops of tragedy and death in previous timelines. Now living in a peaceful world free from the curse, Rika begins to question the nature of her reality. She experiences a dream-like sequence where she encounters Hanyuu, the deity who once guided her, and grapples with existential doubts about her existence and the sacrifices made to achieve this peaceful outcome. This arc delves into themes of identity, memory, and the cost of breaking free from cyclical suffering.

The second arc, "Hirukowashi-hen," shifts to a more lighthearted tone, presenting a comedic and surreal scenario where the characters are reimagined in a high school setting. This arc serves as a parody, breaking away from the series' usual dark themes. It features exaggerated character interactions and absurd situations, providing a stark contrast to the intense and often tragic narratives of the main series. Despite its comedic nature, the arc subtly reinforces the bonds between the characters, particularly the friendship between Keiichi Maebara, Rena Ryuuguu, and Mion Sonozaki.

The final arc, "Hirukowashi-hen Special," continues the comedic tone but incorporates elements of the series' darker themes. It explores the idea of alternate realities and the fragility of the characters' happiness, blending humor with moments of tension. The arc also revisits key events from the main series, offering a meta-commentary on the nature of storytelling and the characters' roles within it.

Throughout the series, the core cast remains central to the narrative. Rika Furude, as the protagonist, continues to grapple with her past and the weight of her experiences. Keiichi, Rena, Mion, and other familiar faces from Hinamizawa play significant roles, whether in the serious or comedic arcs, maintaining the emotional and thematic continuity of the franchise. The OVA series balances introspection, humor, and occasional suspense, providing closure to some lingering questions while celebrating the enduring relationships that define the series.