Ritsuka Aoyagi is alone in the world--never fitting in at school and alienated from his own past by a fragmented memory. When his beloved older brother is brutally murdered, Ritsuka is heartbroken but determined to find answers. His only lead is Soubi, a mysterious, handsome college student who offers him an intimate link to his brother's other life: a dark and vibrant world of spell battles and secret names.

Seimei is very much alive and has torn through the Seven Voices Academy like a whirlwind. As Septimal Moon struggles to right itself and keep its secrets from spilling out, a new enemy takes center stage: the unit named "Bloodless" wages a crippling psychological war, ending battles without spilling a single drop of blood. Yet Ritsuka and Soubi must emerge victorious against them--or lose Kio.