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 figure out who it is. However after...

Takuya Arima is a cheeky high school student who enjoyed playing pranks and was well-known for trouble. His father was famous for the local Geotechnics construction project that would involve demolishing the local's historical ancient Mount Sankaku. Strange phenomenas have been frequently occurring and his father had died...