Kuesu, who has returned to the fold as an immortal, arouses great joy and relief in Yuuto. But at the sight of her beloved Young Lord happy and in the arms of another, Himari succumbs to the dark beast that dwells within her and goes on a rampage. As a demon slayer whose duty it is to stop out-of-control ayakashi like Himari, what decision will Yuuto make?!
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