Originally Posted by Tenhou

Actually, that is a special limited thingie in the gacha corner. I imagine this thing they are implementing on nutaku is the very same deal. It appears now and then for limited times, the other time being a step-up gacha.

They just added it, you can now choose any 6* girl for 5000 Nutaku Gold. It only lasts until the 8th of July, so hurry on up! I really really really want one, but there's just no way I'm spending that kind of money for 1 girl. :/