The Death Mansion and the Red Wall (Empty Fort Strategy) Koumei regains consciousness, together they conclude that they lack the evidence to capture the culprit and thus decide to empty the Empty Fort Strategy to lure the culprit out. Using the strategy, they created the sense that no officers are guarding Naiko's apartment and successfully lure Naoki Midorikawa. Yamato reveals that Akashi had katakana spray painted on his wall indicating Naoki to be the murderer. Naiko, who was meeting his old friends to ask for money, finds Akashi and having misread the message began to spray it over with red paint cans. He realized that the message was indicating Naoki, takes a picture of the message, and uses it to extort money from Midorikawa...