From what I can tell, this is a game in the “oppai misete” (show me your breasts) genre, where the premise usually involves a girl in a card shop who agrees to show her chest in exchange for certain items or affection. The “-R-” might indicate a revised or remastered version.
The series thrives on the juxtaposition of a "geeky" card shop environment—filled with boosters, playmats, and competitive players—with the illicit and intimate moments that occur in the backroom or after hours. Card Shop de Oppai O Misetekureru Onna No Ko -R...
: Some scenes are locked behind specific "Quests." Check your quest log frequently; these usually involve winning a match against a specific opponent or reaching a certain shop rank. From what I can tell, this is a