That's Catch 22

That's Catch 22 is a novella within the Digital Devil Saga series.

Summary
It was published in MediaWorks' Digital Devil Saga: Avatar Tuner ~The Master Guide I~ and later as a compilation of two parts in Digital Devil Saga: Avatar Tuner ~The Master Guide II~. The novella is set in 2014 America.

Characters

 * Heat O'Brien - A student in 's school of medicine. He is described as being eighteen years old with blond hair and as being an advanced placement student. Having lost his sister to disease at a young age, he is interested in medical science.
 * Serph Sheffield - A student at the same university as Heat. He is the youngest in his academic year at sixteen and basks in the attention it garners him. He knows a lot about the students and faculty of the school.
 * Henry Harris (ヘンリー・ハリス) - A professor of genetics at Yale. He is forty-eight years old.
 * Allen Harvey (アレン・ハーヴェイ) - An FBI investigator.
 * Margot Cuvier - A woman from the World Health Organization who discovers the Cuvier Syndrome, complications caused by the crystallization of somatic cells. She lectures at Yale.