In a futuristic world where dueling has become the ultimate competitive sport, aspiring duelists from across the globe gather in a sprawling metropolis to pursue their dreams of becoming champions. Among them is Sae Kurozaki, an 18-year-old duelist with a quiet demeanor, a mysterious presence, and exceptional talent for Xyz Summoning. Enrolling in a prestigious dueling academy, Sae finds himself surrounded by fierce rivals, unexpected friendships, and a budding romance that gradually changes his outlook on life. However, as he climbs the competitive ranks, strange incidents begin to reveal a darker side to the world of dueling. With powerful opponents, legendary monsters, and hidden secrets awaiting him, Sae must discover what it truly means to be a duelist—and what he’s willing to fight for.