A tweet by Uguisu-sensei led me here! (The chapter list for this anthology doesn't say which mangaka did what.)
Her style here is more conventional, more so than her usual, and yet it's dissimilar to the PMMM original style. What we get is a careful visual treatment, which also demonstrates her artistic chops, IMO. Quite professional. She did indulge herself with the rotting corpses, though, lol!