Tenkei no Arimaria

Japan: the Gambler's Paradise! The rich and beautiful Maria is well-known as a legendary gambler who will take on any challenge, no matter how unreasonable or impossible! But what happens when she meets a lowly slave who solves her riddle..? Twist after twist! So tense you'll forget to breathe! (Source: Manga Box)

Volume 2 contains the prequel side story Once Upon a Time which was simultaneously published in Japanese, Chinese and English (as The Godlike Gambler ARIMARIA) from June 4, 2014 to July 2, 2014.