Ep. 6: Saikawa and Nishinosono return to the camp and investigate Dr. Shiki's rooms for a clue.
Aired on November 13, 2015

Saikawa and Nishinosono return to the camp, putting off trying to find a solution to the case. But they can't stop thinking about it. They go back to the lab and investigate Dr. Shiki's rooms again, where they find a strange number that is a clue.
Episodes
- Ep. 2 · Moe's sinister discovery at Dr. Magata's lab during the Himeka island camping trip
- Ep. 3 · Shiki's sealed room reveals a mysterious corpse that baffles everyone present.
- Ep. 4 · Shindou's Death and the Discovery of Robot Michiru in Shiki's Room
- Ep. 5 · Nishinosono and Saikawa investigate Shindou's murder and Shiki's past
- Ep. 6 · Saikawa and Nishinosono return to the camp and investigate Dr. Shiki's rooms for a clue.
- Ep. 7 · Saikawa encounters Miki and notes Dr. Magata's unchanged childhood mind while Moe faces her past in VR with Shimada.
- Ep. 8 · Nishinosono recalls Saikawa's presence after her parents' death following VR experience
- Ep. 9 · Saikawa solves the locked room mystery after police investigation stalls on the island.
- Ep. 10 · The reality behind the murders is exposed through a virtual reality meeting.