Abnormal Brave Containment Center

"You... Really thought it was over?" Thirty years ago, when the brave Yaanis asked this question in the Demon King's Castle, she was confused by the Demon King's whisper before his death. Thirty years later, the otaku Ya'an who traveled through time and became this brave man stood in front of the ruins of the same castle. The ruins of the demolished Demon King's City became her shelter.