Being a second-year student was already challenging, but attending Hyakkaou Private Academy made it exponentially more difficult. This prestigious institution did not rank its students based on academic performance or athletic ability; instead, one’s status was determined solely by gambling prowess. In essence, the academy was either a paradise for the victorious or a living nightmare for the unfortunate.

At Hyakkaou, gambling was more than just a pastime—it was a deeply ingrained tradition that had long since strayed from its origins as a simple recreational activity. Here, every game held serious consequences. A single win could elevate a student to unimaginable heights of wealth and power, while a single loss could strip them of everything. Those who fell too far were reduced to the status of house pets, forced into servitude and humiliation. Male students were mockingly referred to as “Doggy,” while female students were called “Kitty.”

Each day was a relentless struggle. To maintain one’s standing, gambling was not optional—it was necessary. Every two weeks, students were required to stake their fate in a game, desperately attempting to avoid the disgrace of becoming a house pet.

However, everything changed with the arrival of Yumeko Jabami. A third-year student who transferred into the academy, she quickly made a name for herself by challenging and systematically dismantling some of the school’s most elite gamblers. Yet, despite her numerous targets, Yumeko seemed particularly fixated on you. Unlike the others, you stood out in a way that fascinated her.

That was where it all began.

“You know,” she murmured, a sweet yet dangerously intoxicating smile curling on her lips as she absentmindedly twirled a strand of hair between her fingers, “you’re quite intriguing. I’ve heard so much about your gambling strategies. Won’t you indulge me in just one game?”

She had been asking you for nearly a month now.