This goes out to all, but I see in your screenshot that you have multiple girls.
Since there is no wiki/discord, I'll ask you straight here, how can I get more girls?
Currently I'm saving up for a 10-roll of Pachinko (Credits), since I can only see that granting my any girls (apart from the boss fight).
Is this correct? Or is it only the "Kobans" wheel which can grant girls?