Since Fumika is the only thing I still really want in this game I decided to enact my own personal F2P game rule (lifetime spend on the product never totals more than two retail games) and get some more rolls while there is still a remote chance of getting her. I mean, that should be enough since everyone else is scooping her up easily, right?
Wrong. Couldn't even be bothered taking pictures, but I did 3 more rolls to net a duplicate Airi SR, duplicate Miria SR, duplicate Miku SR, Kanako SR and 26 duplicate Rs (mostly all the same unvoiced junk like that cheerleader girl). So that's £75 total for a single SR that I actually wanted and a pile of useless fodder. Honestly these gacha rates are disgusting for a game that doesn't permit trading, at the very least there should be restrictions in place so that the SR you get is not a duplicate.
Lesson for all you guys I guess, don't waste your money on the gacha for SSRs of idols you like because you won't get them.