An innocent sightseeing trip to Kyoto opens up a magical realm to shy high schooler Chikahito Takamoto. Visiting a legendary shrine, Chikahito finds himself in the mystical world of Hana and her comrades—and his immunity to their powers leads them to believe that he's no ordinary, awkward teenager! Protecting our world from violent supernatural beasts, Hana and her team welcome the confused Chikahito—who isn't quite sure that he wants to be caught in the middle of their war!

A strange dimension overlaps with our reality, sending magical creatures and bloodthirsty spell casters against the forces of Hana and her team of Earth's protectors. As the newest member in Hana's strange group, awkward high schooler Chikahito Takamoto is looked upon with puzzlement and suspicion. His teammates have no idea how he can be immune to their special powers, and they wonder if Chikahito has any latent powers of his own. Finding himself in the middle of a high-stakes mystical war, Chikahito tries to make sense of the quirky, moody allies he's found himself aligned with and his own feelings for Hana—a strong, short, and awfully cute warrior!

Trying to raise a small army to fight a reincarnated military tyrant, Hana and the members of her strange Ura-shichiken squad come together to protect humanity in present-day Kyoto. Using their mystical dominion over the elements, the colorful crew faces a torrent of hostile invaders as they try to pinpoint their elusive enemy and entice more allies to their side. Chikahito, a seemingly ordinary teenager, has been accepted into Hana's group and thrust into the middle of this war—but it's possible that he has latent powers of his own!

Striving to enlist more warriors to their side, Hana's team must convince reincarnated historical figures to join them as they attempt to acquire powerful, supernatural weapons before their enemies do! More colorful characters enter the fray, and the newest member of Hana's inou squad—the slightly overwhelmed Chikahito—learns secrets about the mysterious oni creatures and those who control them!