The adventure of a young boy on board a space train, as it travels to a myriad of incredible worlds.

Twelve-year-old Koichi, who has been separated from his brother Ryunosuke due to his parents' divorce, hears a rumor that the new bullet trains will precipitate a wish-granting miracle when they pass each other at top speed.

The urban legend that "Scissors-san", who cuts elementary school students with scissors, appears in Toride, Ibaraki Prefecture, has become a hot topic. Around the same time, fellow junior high school students, Chiba Akira and Minamiki Shuhei of the good friend group "Lemmings", have a plan to regain the days lost by the events that occurred in the summer of the second grade of elementary school six years ago.

High school student Yoshiro Kobayashi (Mahiro Takasugi) is the great-grandchild of the first president of the Boy Detectives Club. He enjoys time with his friends Watari (Gaku Sano) and Saya (Mayu Hotta). One day, the Fiend with Twenty Faces appears in front of Yoshiro. Mysterious cases then takes place in sequence.

Tsuchiya, who lives with his single mother in Osaka, does not get serious work once he graduates from high school, but rather devotes himself to mailing jokes to the “Ohgiri” variety show. Seeking to be recognized as a show “Legend,” he devotes his entire life to laughter, setting himself the task of submitting hundreds of entries per day. At loose ends, he encounters a drifter, Pink, who finds him work at his bar while Tsuchiya now devotes himself to becoming a “postcard craftsman” who submits material to a radio program. The entertainers on the program begin to use material from his postcards. A comedian Tsuchiya admires, one of a comic duo called “Bacon,” says on the air that he admires Tsuchiya’s material and that he wants “to do material together.” Dreaming of another chance, Tsuchiya heads for Tokyo.

Takagi, now grown up, revisits her middle school as a trainer. She encounters Nishikata, her former classmate she used to tease, now a PE teacher there. Their playful dynamic resumes, leading to more interactions between the two.

After the death of their estranged father, 3 adult sisters invite their teenaged half-sister to live with them.