In Hanafuda, follow Izuna's journey as a former noble, now a demon hunter seeking vengeance against the oni responsible for the loss of Lady Kiri, his beloved. Along the way, he partners with a mystical young fox with shapeshifting powers, embarking on a quest to defeat the oni. The narrative unfolds akin to the Japanese card game, Hanafuda, where each chapter mirrors a different card suit and its corresponding flower, adding a unique and thematic layer to the story.