This two-parter seems to wander even more than the first two-parter did. One of the first people 6 meets in the first part is a cab driver nameed 147. 147 is a family man with a wife and a daughter. This relationship becomes critical to the final piece of the story.
6 is paired with 909 for investigations and it is not a random choice. It seems everyone is investigating everyone else. They have some high tech devices to spy on each other and it becomes obvious there is no privacy in this world. It's like 1984. Someone is always watching.
6 discovers secrets about 11-12 and 909 and also realized that the women doctor he has become friends with, 313 is being monitored as well. It is pretty obvious that 6 is wearing 313's defenses down even though he may not have been trying too. Just then 6 is invited to a match making company. Again, not a coincidence. There he is matched with 4-15 who is a blind girl he knows from his past life. She was the company operative who in the end tried to warn him. Here in this world she is blind. It turns out that by manipulation 6 is being brought into a relationship with 4-15 and finally asks her to marry him. She accepts. As 313 is falling for him and at the same time doing the manipulation at 2's order there is the dilemma.
There is much more than this going on so you'll need to see the piece to follow it all. It is unfortunate that they must go in such a round about way to get you to the end. I would say this part is not quite as good as the first and that wasn't that good. So... Thanks for reading...