Yuri has just been awakened after recovering from an attack by Gnosia infectees; humans infected by an alien organism that causes them to kill others. As their refugee ship from Liu-An is threatened by the detection of a single infectee amongst them, Yuri (affected with amnesia) is tasked to help...
The story of "Sigma Harmonics" begin in Kurogami Mansion where a great Clock Tower seals away demons known as "Ouma" existing within the flow of time, creatures that can alter people's thoughts provoking them to do malicious deeds. Sigma Kurogami a "Sound User" and his friend Neon Tsukiyumi, a...
