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Six years ago, the right half of a corpse was discovered. The left half was never found…until six years later, completely fresh with no signs of decay. Now, Special Agents Mizuki and Ryuki, along with their AI partners Aiba and Tama, are tasked to solve the bizarre Half Body serial killings while unveiling the mysterious plot known only as the Nirvana Initiative…

Deluxe Edition Contents:
・AI: THE SOMNIUM FILES –nirvanA Initiative–
・AI: THE SOMNIUM FILES –nirvanA Initiative– Complete Soundtrack
・AI: THE SOMNIUM FILES - nirvanA Initiative DLC Kimono Set
・AI: THE SOMNIUM FILES - nirvanA Initiative DLC Monochrome Set
・AI: THE SOMNIUM FILES - nirvanA Initiative DLC B-Movie Horror Set