The drama that this is taking the spot of always has 50 episodes since it’s a long weekend drama.
The weekend KBS2 Sat-Sunday 9pm dramas are always 50 episodes long. And they often have a slow burning plot so if you really are interested in this watch it after this ends lol As someone who has been watching these dramas for years here's what I do - watch the first few episodes and sometimes they're enough to tell you the trajectory of the drama cuz often times if it has a bad start, it'll almost NEVER improve.