One day, Hiroshi was helping in an acquaintance's shop and accidentally breaks a jar that cost 1 million yen. Hiroshi can't pay for that and he calls his parents' house as a last resort. He receives news that his father is ill with only 1 year left. Hiroshi wants to make his father happy and decides on a fake marriage. They find a lesbian teacher called Ayako interested in fake marriage on the internet. However, when they go to meet her the angry girlfriend of Ayako called Ami shows up and a man tries to catch Hiroshi for not paying his 1 million yen debt. They steal a van and Ami, Hiroshi and Toshiya drive off in hopes of finding Ayako.
Unfortunately the movie Kyōkai-sen no mukō-gawa is not yet available on HBO Max.
| Directing | Ikuyo Koyauchi | Director |
| Writing | Ikuyo Koyauchi | Screenplay |
| Production | Shinji Komada | Producer |
| Editing | Shōji Sakai | Editor |
| Camera | Katsuji Oyamada | Director of Photography |
| Sound | Koichi Yasuda | Music |
| Writing | Chie Imamura | Screenplay |
| Directing | Kunifumi Yoshida | Assistant Director |
| Writing | Mikio Seshita | Script Consultant |
| Lighting | Katsuji Oyamada | Lighting Director |
| Directing | Minoru Kunizawa | Assistant Director |
| Directing | Masahiro Sugiyama | Assistant Director |
| Camera | Ukyō Murasame | Assistant Camera |
| Camera | Fuku Yōdama | Assistant Camera |
| Production | Yasuto Fukui | Production Coordinator |
| Camera | Taiji Yoshimura | Still Photographer |
| Directing | Masato Obara | Assistant Director |
| Directing | Kenji Hanyû | Assistant Director |
