Yuki Nijino's manga / #prequel/prelude:Itou-San(1)

I: Episode 0

Complete | kuraka sui | 2016 released

Chapter 1-3 is the Prologue of Itou-san, when "Itou" was still "I" a prototype No.9. The rest are the later chapters of Itou-san. Sequel - http://www.mangago.me/read-manga/itou_san_kuraka_sui/-