Secret Series by Yoshiki Tonogai

"There are three murderers hiding in your midst."These ominous words given to the six survivors of a tragic bus accident are followed by an ultimatum: The murderers must anguish over their crimes and find a way to answer for them within one week, or the evidence of their sins will be given to the police.But when every person has a secret, who can you trust...?

When one of the students is attacked after his sins are brought to light, the remaining survivors grow ever more suspicious of each other. As secrets arise and suspects collide, the question remains: If one murderer truly was hiding in their midst, are there really two more watching from within?

The tension among the survivors of the bus accident reaches its threshold as the one-week deadline finally arrives. The three killers may have confessed, but does this mean that all their sins are accounted for? What truly constitutes a crime? Or to what extent is an action criminal? When the gavel falls on their sentences, perhaps all might not be as it seems.