Zerozaki Soushiki no Ningen Shiken

Zerozaki Soushiki no Ningen Shiken is the first installment in the Zaregoto spin-off series focusing on the Zerozaki family of hitmen. Written by the prolific novelist NISIOISIN, it was released in 2010 as part of an expansion into the lore established in the Zaregoto series. The narrative serves as a prequel, detailing the background and character development of the fan-favorite character Soushiki Zerozaki, further cementing the dark, stylistic tone that defines the author's early career.

The character designs and cover illustrations for the series were provided by the artist take, whose minimalist and sharp aesthetic became synonymous with the Zaregoto franchise. The series was designed to explore themes of identity and moral ambiguity within the author's idiosyncratic universe. Upon release, the volume was well-received by fans of the original light novels for its ability to maintain the high-concept prose and complex character dynamics that made the main series a significant cult success in the Japanese literary market.