Written by Tadashi Satomi and originally published in 2004 in two parts across MediaWorks’ Digital Devil Saga: Avatar Tuner ~The Master Guide~ duology, That’s Catch-22 is a novella serving as the official prequel to Digital Devil Saga. So, what else is there to know?

Set in 2014 America, That’s Catch-22 chronicles the events that lead Heat O’Brien and Serph Sheffield to meet amid their studies at Yale. The murder of Heat’s genetics professor — Henry Harris — sets the story into action as Heat is subsequently framed; however, Serph springs forth to present himself as a witness and unlikely ally, manipulating the verdict in his favor.

That’s Catch-22 was fan-translated into English as of 2018. The first part — Lux — was posted in February, with the second part — Veritas — following in July. Both parts totaled approximately 23.3k words altogether.