Kazuma Yagami possesses "Fuujutsu," the power to manipulate wind. He comes back to his former residence, the noble Kannagi estate, following a four-year banishment caused by his failure to master fire and his subsequent loss in a duel to his younger cousin, Ayano Kannagi. His return after such a harsh exile already sparks numerous tensions, but things worsen when several members of the Kannagi clan are recently killed using Fuujutsu. This causes the Kannagi family, including the impulsive Ayano, to suspect Kazuma of being the perpetrator. Consequently, Kazuma must not only prove his innocence but also assist the family he mutually despises to uncover the true identity of the murderer.