Be positive, as you are correct. Very creepy horror from Japan 20+ years ago.
Happy to see that a thread for this movie exists here: Pulse (the original Japanese one)
The other frames:
40: (visual reminds me of the roof scenes from The Room)
60: (better visual representation of genre)
80: (framing reminiscent of end of The Graduate)
Final frame:
An earlier film by this director, Kiyoshi Kurosawa, was deemed Criterion-worthy- https://www.criterion.com/films/27666-cure
@charmtrap - To you sir!