Five years before the events of "Boogiepop Phantom", Nagi Kirima met and befriended Shinpei Kuroda, an undercover agent of the Towa organization, at the local prefecture's hospital. Nagi was hospitalized because she was dying as her body was evolving. Shinpei, upon learning the truth behind Nagi's sickness, betrayed the Towa organization and administered a stolen Towa drug to Nagi that saved her life. He was mortally wounded by Towa agents as he fled from the hospital, leaving the drug behind in the process. Touka Miyashita came across Shinpei (as the Towa Agent Scarecrow) and the psychological trauma from seeing the dying man (after being hit by More Murder) created her Boogiepop persona.