"Dark Gathering" is a supernatural horror manga that centers around Keitarou Gentouga, a college student with a traumatic past involving encounters with malevolent spirits. After a childhood incident left him marked by a curse, Keitarou becomes a recluse, avoiding social interactions to protect others from the supernatural dangers that seem to follow him. His life takes a turn when he meets Eiko Houzuki, a mysterious and eccentric girl with a deep fascination for the occult. Eiko, who possesses her own unique connection to the spirit world, convinces Keitarou to join her in investigating haunted locations and confronting vengeful spirits.

The narrative unfolds as Keitarou and Eiko, along with their ghostly companion Yayoi, a spirit bound to Eiko, embark on a series of dangerous missions to gather powerful spirits for a mysterious purpose. Eiko’s ultimate goal is to locate and confront a specific entity tied to her past, while Keitarou seeks to break free from his curse. Their journey leads them to explore cursed sites, unravel dark histories, and face increasingly terrifying supernatural threats. The story balances horror with moments of character development, exploring the psychological toll of their experiences and the growing bond between the protagonists.

Keitarou’s cautious and empathetic nature contrasts with Eiko’s bold and sometimes reckless approach, creating a dynamic partnership. Yayoi, though initially appearing as a passive spirit, plays a crucial role in their battles against malevolent entities. The manga delves into themes of trauma, redemption, and the consequences of meddling with the supernatural, all while maintaining a tense and eerie atmosphere. The plot progresses through episodic encounters with spirits, each revealing more about the characters’ pasts and the overarching mystery surrounding Eiko’s quest. As the stakes rise, the line between the living and the dead blurs, forcing the characters to confront their deepest fears and the true nature of the spirits they seek to control.