The official website for Shogakukan's anime film of Mei Hachimoku and Kukka's The Tunnel to Summer, the Exit of Goodbye (Natsu e no Tunnel, Sayonara no Deguchi) young-adults novel posted a teaser trailer and teaser poster for the film on Wednesday. The teaser reveals more of the film's staff and its September 9 opening date.
As previously announced, Tomohisa Taguchi (Akudama Drive, Kino's Journey - The Beautiful World, Digimon Adventure: Last Evolution Kizuna) is directing the film at CLAP (Pompo: The Cinéphile), but the site now also credits him as scriptwriter and storyboarder, as well as line director alongside Kanji Miyake. Tomomi Yabuki (Pompo: The Cinéphile animation director) is the character designer and chief animation director, with Yabuki, Seiji Tachikawa, Akio Hasegawa, and Yasuhisa Kato as animation directors. Harumi Fuuki (Miss Hokusai, Forest of Piano, Tsurune) is composing the music.
Yuuki Hatakeyama is the art director at Kusanagi, with Eiko Tsunadō in charge of art setting, and Daiki Kuribayashi in charge of art boards. Saori Goda is the color key artist. Kazumi Inadome is the prop designer. Kou Hoshina is the director of photography, while Akinori Mishima is editing. Chiptune is handling the CG animation. Satoki Iida is the sound director, and Studio Mausu is credited for sound production. Kana Uzawa is credited as sound production manager. Shingou Nishikawa is credited for setting production. Akinosuke Kanazawa, Keijirō Taguchi, and Makiko Mameda are credited for production.
Tono Kaoru heard a rumor: The laws of space and time mean nothing to the Urashima Tunnel. If you find it, walk through and you'll find your heart's desire on the other side...in exchange for years of your own life. On the night Kaoru just so happens to find himself standing in front of a tunnel that looks suspiciously like the one the rumor describes, he finds himself thinking of Karen, the sister he lost in an accident five years ago. To Kaoru's surprise, he's been followed by the new transfer student Anzu Hanaki, who promises to help him experiment with the mysterious tunnel--but what does she want from Kaoru in exchange? And what will he have left to give, after the tunnel's done with him?
Hachimoku released the original light novel in July 2019, with illustrations by Kukka. The novel was ranked #9 in the bunkobon category of 2020 edition of Takarajimasha's Kono Light Novel ga Sugoi! (This Light Novel Is Amazing!) guidebook.
Koudon launched the manga in Shogakukan's Sunday GX magazine in July 2020, and ended it in November. The manga serialized both on Shogakukan's Manga ONE app and in Sunday GX. The fourth and final volume shipped on December 17.
Seven Seas will publish the novel on May 10, and the first volume of the manga on July 26.