A pretty disappointing number for Undead considering every variable playing here. It's a normal growth from Volume 2, around 2.500 copies more in 1 day less (13.521 for Volume 2 in 4 days, 16.105 for Volume 3 in 3 days), but that's just it, a normal growth that should have happened without anything else happening. Knowing that Volumes 1 and 2 have been ranking daily since results were revealed for Tsugimanga and that they even spiked back when Volume 3 released, this is a bit low. I was at least expecting 18-19.000 copies since Oricon number will probably be even lower. And that's not even considering it appearing on King's Brunch, but I was the one who said that it could do nothing at all given we had past records of it not boosting anything, so I guess I knew already?
Anyway, it'll probably at least appear in Oricon, even with a threshold that would happen in weeks with no volume releases. This month is pretty weak overall.