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Download the user manual here.
The last key point in the generation is the route to conquer a certain city. The only thing you need to keep in mind here is whether you'd like to see an event for a certain character or not.
If you're not really interested, you can instead select an option where you can easily adjust the affections and link gauge to where you should be at the end of the generation.
If you'd like to see the special event, make your selection according to the hint mentioned earlier. You also need to keep in mind that this option requires a little more time.
After selecting the correct option, the rest will be up to time, that character's affection level, and the mood of a character who's good at massage.