Following the events of Hoshi no Umi, Zakuro attempts to adapt herself to her new life as a resident of Sakurashin. While Akina pays a visit to the memorial to his grandfather and all the youkai tuned by the Hiizumi family, he is confronted by Enjin, who attempts to possess his body but is driven away by members of the senate, but little they know that Enjin soon after learns to control the same power they used to defeat him and becomes an even more dangerous threat.