Not 100% sure, but...Sorry if this has been answered elsewhere (I looked around but couldn't find it).
What are these new settings on start with 3.0?
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The top part is to set your name. First button 'sets' it, second button... says "Leave it to me"? Third button is "Not set" or "unset".
The bottom is an expanded "Relationship" setting like the H-Scene Settings we have in 2.5.2 Higher number = spicier/lustier, I believe.
Leave it at 1 if you want to play normal.
0 is Platonic, basically disables H scenes afaik. "You can change this after the game starts, but engaging in H activities disables 0 (Platonic)"