with 3 episodes premiered on September 20, 2019

These specials show us interviews and commentary from the cast, crew, and author of The Effect. Behind-the-scenes clips are shown before and during the shooting of the drama.

with 3 episodes premiered on October 11, 2019

Shin met Keng, as they become intimate, rumors about their peculiar relationship spread like wildfire, leaving them no choice but to refrain from seeing more of each other.