His Majesty the Demon King's Housekeeper manga volume 7 features story by Saiko Wadori and art by Mika Kajiyama.

The demon realm's jungle might hold the key to breaking the anti-cleaning curse. But Sakura and her crew won't be able to investigate just yet. All the contestants in a jungle-wide tournament are falling ill! An aggressive jungle mold is sucking the life out of the jungle denizens. Sakura quickly springs to action to save the day, only to discover this magical mold is built of stronger stuff than she's used to!