Both can be useful. Walking obviously allows content or details to be added in during the walk. Quick navigation can be useful when there is no content to be seen just walking about. The most irritating thing about sandbox mode is when there is no clear objective to go to and you end up randomly clicking to happen upon a scene.
BTW when I mentioned developing the relationships with the girls I wanted to say you did a fair job with a couple of them by telling us their back stories like with Yolanda. That was an interesting bit of info that shed light on her behavior and motivations. I would suggest digging deeper into that especially with the mom and tying that to the dad mystery. You even hinted at that for a false flag I like that. I would refrain IMO from insults like "Jesus Girl". It cheapens the character. She has deep motivation for her emotions and action. She could be a path to solid LI with MC's guidance and the Joob-Joob's influence. Alfred Hitchcock was a master at false flags and plot twists and I always loved his movies. I'm a sucker for a good story and don't really care too much about H content for its own sake. Blend it with a good yarn and draw me into your story and I'm entertained. You've got a good start it just needs refining.
