Speaking of the DLC, you can raise favor/favorability with the girls, so it should be more than just perverted robbery.
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For some reason, I only noticed the favor indicator(?) in my second playthrough. I thought it was like their rating or something.
It's usually hearts, isn't it? Though considering a lot stuff in this game, or WolfRPG, are texts.
I don't know if there isn't a heart symbol that you can type; but after snooping around, I learned that these squares are texts.
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...If I remember correctly...