The hunt for Nagi continues. Yuito's platoon is ambushed but makes a narrow escape. Fubuki and Luka reveal the hospital's secrets and the dark truths behind them. Kasane's platoon searches for Naomi. Karen offers to help with Naomi's condition.

Fubuki puts his plan into action. Yuito and his platoon set out to recover Nagi's memory data. Kasane's platoon learns more about the Kunad Gate and her encounter with future Yuito. Yuito learns a shocking truth from his past. Togetsu comes into play.