Subete ga F ni Naru

Subete ga F ni Naru, known internationally as The Perfect Insider, centers on genius programmer Shiki Magata, whose long isolation inside a remote research facility on a deserted island has turned her into both a legend and an enigma. When associate professor Souhei Saikawa and university student Moe Nishinosono finally visit her, the meeting quickly unravels after a locked-room murder throws the island into turmoil and turns the facility into the heart of an increasingly tangled investigation. As Saikawa and Moe trace the impossible crime, they discover that the building is hiding far more than a single violent incident. Every room, conversation, and guarded silence seems connected to Magata's hidden past, and each answer makes the case harder to read. Cut off from the outside world and surrounded by people who cannot be taken at face value, the pair must piece together what happened on the island while navigating a web of suspicion, logic, and secrets. The deeper they go, the more the line between reason and deception begins to blur, and the mystery surrounding Magata threatens to consume them both.