One year has passed since the nightmarish murder. At Toshio and Midori's wedding, the invitees to the wedding, comrades enjoying the festivities, decide to return to Spool for the after-party. They've been hailed as heroes in the newspapers and on TV, and everyone seems to think of the incident as a fond memory. You, the protagonist, also head to Spool with the others, though you carry a hint of fear.
While in a nostalgic mood, the guests eat cake and reminisce. But then an incident occurs. One of the guests is engulfed in sudden flames and reduced to ash like charcoal...

Where is the culprit? Could it be one of the survivors from that event, whom they trusted so much?

As if to mock the guests, crushed by the weight of their trauma from the past murder and the current event, two more charred corpses appears...

[Translated from http://www.varitra.info/rengoku-kamaitachi]