Ep. 1: Kazehaya Kamito encounters Claire Rouge at Areishia Spirit Academy during a failed spirit contract.

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Areishia Spirit Academy is an institution exclusively for young women training to become elementalers, where male students are prohibited from entering. Kazehaya Kamito becomes separated while attempting to reach the school and meets Claire Rouge, who is undergoing purification rituals for an upcoming spirit contracting ceremony. Claire attempts to form a contract with the Demon Slayer, a sword that has previously resisted all connection attempts. However, the process spirals out of control, leading to an unexpected and chaotic outcome involving the sword and the two characters. This incident marks the beginning of their interaction within the restrictive environment of the academy.