So basically Heavenly Delusion is how the English version call the Tengoku Daimakyo manga which is still ongoing. The anime ended with volume 6 and is still ongoing with 9 volumes with each chapter published monthly around 25th of every single month. I've been told whenever the a new volume is released, Ishiguro revises any apparent issue with the artwork so he takes one break from the monthly chapters. The monthly chapters seem to have a nice pacing based on my experience so far.
