The actual version (with chapters up to 14) is listed as Kakegurui Futago, and can be found here: http://www.mangago.zone/read-manga/kakegurui_futago/
The actual version (with chapters up to 14) is listed as Kakegurui Futago, and can be found here: http://www.mangago.zone/read-manga/kakegurui_futago/