Lee Dong-Wook's character writes into the Urban Tales tv show to complain that their costumes for the Grim Reapers is inaccurate. This is a nod to his role as a Grim Reaper in the popular k-drama 'Goblin'.
This is the second time Lee Dong-Wook and Eom Hyo-Seop have worked together in a series. They previously worked together in Laipeu (2018).