I'm not sure what to think of this game.
At first it's a grind, you unlock a few images and start getting gems from duplicate draws. You mostly see the same 2 common girls but you do see rarer ones and with auto-roll on you get gems fast enough to get an upgrade relatively quickly.
Once you have the draw speed upgrade you get gems much faster. It also makes buying upgrades harder since the menu bobs up and down. Once you have the 5x draw you get gems very quickly and can buy whatever you want.
I'm still not sure what Luck does. I can see with 2.3 Luck I see rarer girls more often, but when I was grinding for 1000 Gems I bought the 0.25/2min boost and ended up losing money. I don't read russian and used a translator to translate some of the information but I didn't notice anything explaining what luck does. This is bad since it's the cheapest thing you can buy.
And now I have infinite money but nothing to spend it on. I could let the game run in the background until it finds the last three girls but I have nothing left to do except buy Luck every 10 minutes.