Remake of old superhero show of the same name.

The reincarnation of Himiko, the former queen of Yamatai, has decided to wage war against all magatama wielders of Kanto. In order to recover her lost kingdom, she must gather the true Three Sacred Treasures of Japan. When Himiko's ally, Asaemon Yamada, ruthlessly attacks Nanyou Academy—which possesses the sacred sword Himiko is after—Chuubou Sonken, Hakufu Sonsaku's newfound sister, awakens her dragon but loses consciousness. Determined to save her sibling, Hakufu must recover her magatama at the Jofuku Temple—a legendary place where she will receive training that may cost her her life. As the frontier between the living and the dead starts to vanish in Jofuku, the warriors of the Kanto region will have to unite in order to foil Himiko's mysterious plans.

Shin Koihime†Musou characters sing theme songs on stage at a live event.

Following the battle for Touka Village and clearing the area of bandits, Unchou Kan'u, Chouhi Yokutoku, and Shokatsuryou Koumei prepare for the next step of their journey. They encounter someone surprising—a young woman claiming to be Gentoku Ryuubi! After being framed for various crimes, Ryuubi is on a mission to reclaim her family heirloom, the sword of Chuuzan Seiou, and clear her name from the evil deeds she allegedly committed. For Ryuubi's own safety, the four girls join forces and pursue the sword as it repeatedly changes hands, but they are never quite able to catch up to the current owner. During the adventure, Kan'u and the others meet several familiar faces who happily do what they can to assist in the hunt. Meanwhile, Kan'u and Chouhi continue to learn that there is more to family than blood relations.