Idol Mahjong Final Romance R PremiumSega Saturn Japanese (NTSC-J) Software
Whoa, this thing has the RED X of "Sega says this is for adults only" on it! And... it's basically a strip mahjong game from what we can tell. Do beware that even the art booklet included for this particular title is definitely more adult orientated. This is the more common "standard" release.
Used Idol Mahjong Final Romance R Premium [mini art booklet] (good case, good instructions)