The Big O: Lost MemoryNewThe Big O: Lost Memory; ＴＨＥ　ビッグオー　－ＬＯＳＴ　ＭＥＭＯＲＹ－; THE 만화 LOST MEMORY; 魅影巨神 THE BIG-O 失落的記憶; 魅影巨神 THE BIG-O 失落的记忆

After the Angel Incident, Roger finds himself locked in a battle with Beck in his nightmares in a light-less realm. What is going on in the heart of an android like Dorothy who looks at him with concern? Continuing the story of The Big O manga these volumes take place between volume 5 and 6 of the original manga series.