A Fairyground-dweller finds himself unable to stop cracking jokes at inopportune moments.
This errand is available to complete after defeating Royal Jelly.
It looks like the pink fairy near the Cavity Club to the south is missing some restraint since he's on an infinite jest spree. The restraint you're looking for, if you hadn't already gotten it, is located in the southeast corner of town. The customer here has plenty of it. Manage the exchange and get rewarded, simple as that.