Deep Voice  

The narrative takes place within an antiquated Western-style medical facility where Takumi lies imprisoned. Following a tragic incident, Takumi has developed peculiar talents that allow him to perceive the "echoes" of past occurrences scattered throughout the hospital and enter other individuals' minds while slumbering. Alongside Amano Aki, Takumi endeavors to unravel the enigma surrounding the hospital's history, while Dr. Yanagi Hiroko seeks to comprehend the nature of his extraordinary ability.