It's a game with twists and turns, although some of the alternate paths won't be developed until later. I disagree that it came out of nowhere. If you followed this one carefully from the start of Day 6, you'll notice Greg sees them go past on Tara's bike. The sight of a naked girl on the back of the bike gives him some concern. He also recognises Casey from college, as well as Tara. He doesn't think Casey could have become a nudist and he knows Tara can be a bully. Smelling a rat, and being concerned for Casey's safety, he decides to follow them. You'll see him in his car in the background in several shots, as well as following them inside the supermarket. Outside the supermarket, he witnesses the confrontation with Cass and steps in. Still concerned for Casey's safety riding naked on a motorbike, he offers her a ride home in his car. During the ride, they both hit it off, and they're both seriously aroused by Casey's nudity, so they end up in bed together.
Once we've finished our V1 concept we plan to come back and find out what happens if Casey doesn't accept that ride. If you've played the Greg path, you may have also noticed Tara following them to the supermarket. That might have repercussions and possibly lead to a crossover in the other direction in due course.
See Day 6 - Main Path with Tara in
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