After a grueling battle against the powerful Zeros, Soubi is badly injured, and in spite of his training, the pain almost too much to bear. He goes to see Ritsuka, but Soubi's erratic behavior and unpredictable emotions take over, and he abruptly storms away before Ritsuka can care for him.Ritsuka is left tormented and confused... but the mystery behind the death of his older brother is about to take an unbelievable turn. Ritsuka finally decodes the message left by Sleepless and goes to meet one of the members of Septimal Moon!