I got another copy of the N card earlier today with a gold button. The rare card does seem a lot more common than the normal card with 1 or 3 R-gacha tickets. I've thrown 200+ R-gachas, some Peromins / Puddings and 50 or so glasses so far and still no SR ;_; (but I did get about 17 copies of the R card and maybe 2 copies of the N card - mostly trading 1 or 3 gachas).

Gonna be spamming Kurito with gold buttons over the next few days with what little resources I have left and hope that she gives me the SR card >_<

Edit: By the way, would people suggest giving her card reveals? I was a bit reluctant to do so but it's just about the only valuable resource I have left that I haven't fed to Kurito, haha.