heromultive
Ten thousand years ago, a massive battle known as the Battle Fight was waged by fifty-two powerful demons called the Undead, each representing a unique trait and fighting for dominance over all others. The battle ended when the Undead were sealed away... or so humanity believed. In the present day, archaeologists accidentally unseal the Undead, causing the Battle Fight to begin once more. To protect humanity, the organization BOARD creates Kamen Riders to fight back. Among them is Kazuki Kenzaki, a kind-hearted but determined teenage boy who becomes Kamen Rider Blade. While balancing his part-time job at BOARD and his life as a student at Oogai First Middle School, Kenzaki fights to stop the Undead from deciding humanity's fate.
Meanwhile, in another world lies the magical Trump Kingdom, where hearts lived peacefully under the guidance of Princess Marie Ange. That peace is shattered when the evil force known as the Jikochu attacks the kingdom. A lone warrior, Cure Sword, fights back but is forced to retreat to the human world with her fairy partner to search for the missing princess. Cure Sword also brings three fairies, each tasked with finding chosen girls destined to become Precure. One of them, Charles, finds Mana Aida, a cheerful and selfless girl who serves as her school's student council president. During her school's orientation at Clover Tower Observatory, Mana encounters a Jikochu that tries to manipulate her heart-but with Charles's help, she awakens as Cure Heart.
As the worlds collide, Kamen Rider Blade, Garren, Chalice, and the Dokidoki Precure-Cure Heart, Cure Diamond, Cure Rosetta, and Cure Sword-must unite to face both the Undead and the Jikochu.
With destiny, hearts, and humanity at stake, can the Riders and Precure stop the Battle Fight and protect both worlds from falling into despair?