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Step into the shadowy realm of ‘Dead Tube,’ a sinister website that thrives on the perverse and sensational. In this twisted corner of the internet, the more shocking and explicit the content, the greater the viewership, fueling a dark and disturbing digital underworld. Tomohiro Machiya, a dedicated member of the Film Research Club, is unwittingly drawn into this grim online world when he encounters Mai Mashiro, a captivating member of the swim team. What begins as an innocent filming request soon unravels into a nightmarish descent.

As the camera rolls during the second day of filming, Machiya is confronted with a horrifying sight—Mashiro brutally murdering one of their fellow classmates. Shockingly, someone else takes the blame for the heinous act, and Mashiro revels in the gruesome success of their ‘winning’ video on Dead Tube. This marks just the beginning of their dark journey. As more students become ensnared in Dead Tube’s depraved contests, they risk crossing a point of no return, where failure carries dire consequences, and the line between reality and the macabre blurs.