Although Natsuo and Youji have transferred to Ritsuka's school to
monitor him in the wake of his brother's bloody homecoming, the unit
named "Moonless" manages to isolate Ritsuka in order to propose a
scheme to turn brother against brother.
With Soubi coerced back into his relationship with Seimei and now
missing, Ritsuka becomes determined to reclaim the strange man who
changed his life from the brother he once adored. Meanwhile, Nagisa
reveals information about the past of Seven Voices Academy and the
painful origins of old loves lost.