All My Fantasy Children

Put on your thinking caps, Junior Wizards! In this episode, thanks to @LeviathanFiles' prompt, "Mr Jeans is *5[= 3@*/>;'s manager. Wheelin' and dealin' to get them the best booking. May or may not be a myconid in disguise." Aaron and Jeff must solve the mystery of Mr Jeans. Who do they manage? Also why are they wearing just a vest and pants in the frozen North?