Who Killed "Okudera Shou"?

1995, a male student was murdered. The student's name was Sho Okudera. Okudera was an honor student who had transferred to a small country town where delinquents abound. As he was being bullied and beaten, he began to act strangely for his own reasons. A sense of disquiet begins to envelop the town, as everyone wonders who killed Okudera and for what purpose. (Source: Shonen Magazine Edge, translated)