Pending Train: 8:23, Ashita Kimi to

As people who wish to move from Car No. 6 to Car No. 5, where the security situation has deteriorated, begin to appear, Yuto (Eiji Akaso) and his friends find a logbook that describes the circumstances of the catastrophe that drastically changed the Earth in 2026, and Kayoko ( Yasuko Matsuyuki and others have been wondering if there is a hint to return to the original era in the mysterious glowing stone brought back. Just then, Rena (Kotone Furukawa) and Akashi (Akito Miyazaki) find a riverside spot with warm water. However, this is a place where Car No. 6 claims territory and the members of Car No. 5 are not allowed to enter. Yuto and Sae (Moka Kamishiraishi) then head to Car 6 to negotiate, but Naoya (Yamada Yuki), who knows Sae's feelings for Yuto, interrupts them and offers to be the negotiator. Furthermore, Naoya, who does not believe that he can return to his previous era, says that he will move to car No. 6...

During the storm, a mysterious black distortion suddenly appeared inside the tunnel of Car 5! Is this a wormhole that connects to the original world? Should I jump in? Isn't there any danger? While Yuto (Eiji Akaso) and the others flinch, the distortion disappears. However, the group finds a glimmer of hope, and to make the distortion appear again, based on the research on time warp by physics professor Hasumi (Shotaro Mamiya), the group is led by Kato (Mi Inowaki) and goes back in time. In search of a clue to return to. However, Rena (Kotone Furukawa) and Koharu (Rin Kataoka), who is carrying a child in her womb, are reluctant to take the risk of returning to the past. Each passenger had mixed feelings. Meanwhile, Naoya (Yamada Yuki) is confused about his feelings for Sae (Kamishiraishi Moka). While Yuto is starting to realize this, Naoya makes an unexpected decision. And then the distortion appears again... Towards the shocking climax!

The passengers manage to make the wormhole appear again and return to the past. However, they arrived not in 2023, but in Tokyo in May 2026, about half a year before the global environment changed. Yuto, Sae, and the others are happy to reunite with their families, even though it has been three years since their original world. Everyone is thinking about the past in their own way. As Naoya enjoys the feeling of returning to his hometown, he also reunites with his younger brother Tatsuya. The passengers eventually return to their normal lives and complain about what they have seen in the future and what will soon happen on Earth. However, not only do the police and government not take their testimonies seriously, but Uemura and others act on their own, exposing the passengers to those around them. However, only Hasumi notices something when he holds the meteorite that Kato brought back from the future. At that time, a serious change occurs in Naoya's body.

The former passengers of Car No. 5 find themselves in a difficult situation after untrue facts are spread online. Naoya (Yamada Yuki), who suffers from unexplained tremors in his hands, and Yuto (Akaso Eiji), who is forced to take a leave of absence due to unreasonable slander, are also on the brink of despair to the point where they think, ``This world should just end.'' I was there. However, around that time, physics professor Hasumi (Shotaro Mamiya) seems to have discovered new facts about asteroid collisions that will drastically change the earth's environment. Meanwhile, Naoya is brought to a countermeasures meeting where the members of Car 5 gather. Also, there is Sae (Moka Kamishiraishi), who they meet for the first time in a while. The group decides to release a video at the suggestion of Yonezawa (Fujiwara Joichiro). Then, with that video as a trigger, things start to move in an unexpected direction.