An old Japanese movie about a girl who dropped her cell phone in a crack in the stairs while walking up them, and then the phone traveled back in time. To a

Mibu is an ordinary high school girl who dreams of becoming a science fiction writer in the future. Due to the untimely death of her father, she lives with her mother, Myoko, as a two-person household. After many years, Mibu's mother finds someone she wants to remarry and wants to introduce her to her. Feeling that this is a betrayal of her father, with a precursor to oblivion, Mibu can't accept it and runs away on her way to the meeting. While descending the stairs, an earthquake suddenly strikes, and caught off guard, Mibu fails to hold on to her cell phone, which falls and disappears in a cloud of light.

The stage shifts to 1912, when a young man, Tokujiro Miyata, is studying under Soseki Natsume, who aspires to be a novelist but is repeatedly rejected. On this day, having been rejected once again, he is about to leave the publishing house when the same earthquake attack hits and a strange little box-like object falls from the sky. Tokijiro hesitantly picked it up and tried to fiddle with it but couldn't find the trick, so he took his cell phone home with him and put it aside.

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In an attempt to retrieve the phone, Mibu tried dialing his own number. After trying again and again, he finally dialed it. A strange man's voice came through the receiver.

"It's my cell phone!" Mibu called out.

"Cell phone?!" The other person was confused.

Minbu learned that Tokijiro was from the Meiji era and could only connect to his cell phone when he could see the moon. This cell phone connects two people who have spanned centuries. As Tokijiro, who is pursuing his literary dreams, and Mibu, who is worried about her mother's remarriage, talk about themselves, their families, and their futures, the two minds fly close together.

Mibu means "walk in the future."

Because of his encounter with Mibu, Tokijiro writes a work that is a labor of love, and Mibu, who has faith in Tokijiro, is relieved that there is one thing that Mibu can't find out - the information about Tokijiro. Mizubu has confidence in Tokijiro, but there is one thing that Mizubu can't find out - information about him. So Mibu turned to his mother's remarriage partner for help, and it was because of the cell phone and the changes that Tokijiro brought to Mibu.

Finally, one day, the two decided to have a date that traveled through a hundred years, on the same street a hundred years apart, two people from different times, sitting in the same place in the store, walking on the same road. The gifts that have been stored for a hundred years, everything like this makes Mibu and Tokijiro feel happy and joyful. The date ended with the imminent depletion of the battery. Mibu began to think about how to pass the charger to Tokijiro through the wormhole. At this moment, Tokijiro is approaching death step by step along the footsteps of fate. Mihoshi makes the call before the Grim Reaper, and at the moment of the battery's depletion, he utters the words "I like you" that he has been hiding in his heart for a long time, while Tokijiro, faced with "what he has to do in his own life", makes his own choice... ...