For this side with the reformist (so don’t send the short lady any blackmail material on the foreign band manager), let Kim get arrested in the letter quest and then when she calls for help work with the reformist leader to get Kim free. The follow his orders to the end for good ending, or try to deviate from them near the end for the bad ending.
So you need to help the lady from office 101 in the bottom floor when she asks you to find some file. Find it, and then she asks you to show it to Wolf. Then follow Wolf’s orders (get Müller to say that he could get Wolf’s wife’s information, break into his office and find his password and go to floor 3 computer to get the information you need). During the letter quest do not help Kim, then when she calls go to Wolf for help. Then follow his orders to the end for good ending, or try to deviate from them near the end for bad ending.