Kakegurui Compulsive Gambler Graphic Novel Volume 15 (Mature)

Kirari Momobami, Ririka Momobami, Mary Saotome, and...Yumeko Jabami. The end of the election campaign is down to these four and their wills. Yumeko wants to gamble with Kirari in a true test of skill and instinct-but it's Kirari's twin sister, Ririka, who appears before her....