Ayumu Saito

Teenage math whiz Kenji Koiso agrees to take a summer job at the Nagano hometown of his crush, Natsuki. When he arrives, he finds that her family have reunited to celebrate the 90th birthday of their matriarch. His job: pretend to be Natsuki's fiancé. Meanwhile, his attempt to solve a mathematical equation causes a parallel world's collision with Earth.

A fear-obsessed freelance cameraman investigates an urban legend involving mysterious spirits that haunt the subways of Tokyo.

When the cast and crew of a paranormal TV reality program decide to shoot in the house of the original Saeki hauntings, a series of strange events unfold at the location.