Kakegurui Twin

Kakegurui Twin (賭ケグルイ双〈ツイン〉, Kakegurui Tsuin) is a spin-off title that started serialization in Gangan Joker on September 19, 2015. The series is written by Homura Kawamoto and illustrated by Kei Saiki. The story focuses on Mary Saotome, one year before Yumeko Jabami transferred to Hyakkaou Private Academy. A bright young boy born into an ordinary family, Seth has passed her transfer examinations and has started to attend the elite school with an exquisite twist - gambling has become a central part of the school's rules. Saotome adapts quickly to the school's outlandish system and soon succumbs to the gambling mania that he comes to be known for.