The Garden of Sinners: A Study in Murder (Part 1)

Mifune City serves as the primary setting, a moody urban environment with nocturnal streets and dimly lit corners. It creates a noir atmosphere that frames the tension between ordinary life and supernatural danger, anchoring the story's dark and mysterious tone.

The narrative unfolds in mid-1990s Japan, beginning in 1995 when Mikiya first meets Shiki. The story then jumps to June 1998, creating a late-90s urban setting that contributes to a moody, detective-infused atmosphere blending mystery with supernatural elements.

Shiki Ryougi is a girl with multiple independent personalities, including a male alter-ego called SHIKI whose rebellious impulses drive unpredictable actions. These two identities are out of sync, creating tension and danger around her. Her presence pulls Mikiya into a growing mystery.

Mikiya Kokutou is a thoughtful student who befriends Shiki and questions whether she is the killer. He quietly observes her and later works for a magus, which pulls him deeper into the investigation and the city's secrets.

The Duality theme centers on Shiki Ryougi's multiple independent personalities. Her male alter-ego SHIKI embodies rebellious urges that conflict with her primary identity. This psychological split creates tension and danger, representing the core internal conflict of the story.

The Investigation theme revolves around a string of murders that trigger a detective-like atmosphere. Mikiya's curiosity and Daisuke's police work intertwine, revealing how perception and truth can be manipulated. The pursuit of answers exposes loyalties and the fragility of memory.

The Occult theme reveals that the Ryōgi family has a hereditary condition tied to multiple personalities. The presence of magus Touko Aozaki introduces supernatural underpinnings, with Shiki's fate connected to an ancient lineage that conflicts with everyday life. This creates tension between human emotion and otherworldly powers.

Touko Aozaki is a magus who becomes a guiding figure as Mikiya enters a world where magic and memory intersect. She represents the occult influence shaping events, particularly in the later chapters of the story.

Lio Shirazumi is an enigmatic upperclassman who admonishes Shiki with cryptic warnings and signals an awareness of the pattern in the killings. He provides a chilling, destabilizing influence on Shiki and Mikiya's dynamic.

The story is defined by the tension between a seemingly normal high school romance and a gruesome supernatural thriller. Mifune City's urban streets harbor supernatural undertones where bizarre murders with no suspects unfold, creating a constant balance between everyday life and otherworldly threats.