Noob question: Is there a prerequisite to trigger the new extended storyline(''20% of the entire NCHDL'')? I've been doing those NCHDL meeting missions, but it doesn't seem like I'm progressing any further.
Note that this process takes about 6 months end-to-end.
Step 1: Get the NCHDL up and running.
Step 2: Attend its meeting every Tuesday afternoon and run missions when offered.
There are two different sets of missions: "quick missions" that are offered more frequently and may repeat and "longer" missions that are offered about every 5 weeks and shouldn't repeat. You need to complete the 3 "longer" missions. The missions are Stolen Chemicals (this one is bugged -- choose Tamara as your partner or it won't count), Stolen Exam, and Locker room investigations. The order presented is random.
Step 3: 5 weeks after completing the last of the "longer missions", you should run into Karma and Terrorstrike on the way to the club meeting.
Step 4: Run through several weeks of further game play. The next set of Tuesday aftenoon events are entirely scripted. Eventually, something will happen that gives you opportunities to make choices. When you have choices, do not choose to do 'nothing' when confronting the guard with a gun. That loop is bugged and locks you into a static event every Tuesday afternoon without any obvious way to advance. If you do get stuck in the repeating Tuesday event, you can break out Friday at lunch by choosing the generic 'friends' option -- there's no indication in-game that this does something different this time, but it should. But that also becomes available every Friday if you want to run through that event again even though it should be a one-off.
If there is more past that Friday event, I don't know about it. I fell face-first into both the bugs and took a long time to seek help past them.