i tried searching for it, for more than 2 hours, could not find anything even close to related to it. i fear you have to wait until someone that actually knows the anime comes up - best of luck to you!
jougasaki mika from the anime "idolmaster cinderella girls"
i now went through 1200+ sites on gelbooru, searching for tags that fit her. i went through different anime databases to search for anime girls with white hair and stuff (and there is a shit ton of them), again with no trace whatsoever. i will now come to the conclusion that she simply does not or should not exist^^
something that takes that long to find and left no trace in the internet with porn or anything, can't be worth your time watching anyway. if only that spanish guy on twitter did actually post the name of it, the only trace found in hours...
i stop my research here, just not worth it.