As a young man (Kazunari Ninomiya) disembarks from a subway train, he receives a phone call from his former girlfriend informing him she’s been hospitalized and is pregnant. He finds himself grappling with this news, particularly given that he recently disregarded an outburst on the crowded train involving an angry passenger confronting a mother and her noisy baby. Agreeing to go to the hospital, he sets off toward exit eight. However, he seems unable to make any progress towards it, and soon realizes a recurring pattern is unfolding. A safety notice catches his eye, offering a potential explanation, and he’s then drawn into an increasingly irritating game of identifying subtle differences, all while encountering a peculiar man with a constant grin (Yamato Kochi), a high school student who seems older than her years (Kotone Hanase), and a perceptive young boy (Naru Asanuma) whose presence is puzzling – perhaps lost, or maybe important in a surprising way. Aside from one brief sequence that feels somewhat appropriate, this isn't really a horror film; it’s more of a psychological thriller with minimal dialogue and considerable repetition. It presents a game for the audience to engage with, but the characters are built on a rather flimsy foundation, leaving little background information to go on. The clues provided feel intended to prolong the movie rather than deepen the plot or stimulate thought, and while there's an element of self-reflection from the main character, crucial pieces were missing that prevented me from becoming fully invested. It brought to mind those television shows like "Tales of the Unexpected," and if it had been trimmed to forty minutes and more tightly edited, it could have functioned better as a mystery with a point. Perhaps it will prompt you to consider taking a walk instead of riding the metro next time.

Source on TMDB