I'm am endlessly out of cash. I've been decently lucky getting girls and it's taking FOREVER to upgrade them.

It would be great if there was another means of making cash. Harem is fine, boss battles are fine (though these events always put the girls with bosses that don't pay anything), activities don't add much. I feel like there needs to be another way to make cash.

Other games have specific jobs that you can assign girls to (I suppose that's what the harem is in a way). Or a loan system where you can loan a girl out in PVP (though PVP is pointless and there is no guild or friend system). I haven't been able to think of a good idea, but I feel there needs to be something else.