The Drifting Classroom Perfect Edition Volume 3 contains volumes 9-11 in a hardcover omnibus format featuring story and art by Kazuo Umezz.

After a disastrous journey into the wasteland outside the school, Sho and the rest of the surviving students return to their fortress, only to discover an even deadlier danger waiting for them. Former friends must fight a final battle as Kazuo Umezz's horror classic careens toward an epic conclusion!