It's Halloween, So We're Reversing! summary:
Da-on, who was dissatisfied with his position, prepares a Halloween party for his lover Hyun-woo. "Reverse potion, werewolf cookie" Da-on bought some interesting items at a prop shop he happened to enter. After eating werewolf cookies, Da-on got dog ears. Huh? Something changed in Hyun-woo after taking the reverse potion!+