Sakamoto Yuna, a determined young girl from a privileged background, embarks on a thrilling quest to become a demon slayer. Along her perilous journey, she encounters Urokodaki, Sabito, and Giyu, who mentor and train her to become an unparalleled prodigy. With unwavering determination and without familial support, Yuna builds her own circle of trust, and her heart is captured by Giyu Tomioka from a tender age. Yet, as with all demon slayers, challenges and hardships lie ahead, testing her courage and resolve.