D.Gray-man: Reverse collects side stories about the exorcists and staff of the Black Order, told across eight chapters spread over three short novels. One follows Allen Walker's own road to headquarters, another sends Kanda to a village said to shelter a witch, and a third turns on Bak Chang's ambitions inside the Order. Later chapters cover the many names Lavi carried before his current one and Lou Fa's search for Allen, alongside comic interludes such as a Black Order reunion party. The collection runs parallel to the ongoing manga rather than continuing its plot forward.