Jiangnan and Shimada couldn't grasp any clues, but as they compiled the information they had so far, they came up with a hypothesis.If the assumptions are correct, everything makes sense.In order to find out the truth, the two visited Nakamura Kojiro again.

Could it be that the unfortunate accident in the Miss Lab club room led to the tragedy in Aoyashiki? Jiangnan and Shimada finally decided to go to Tsunoshima amid various speculations.But that night...