The film adaptation of the light novel The Tunnel to Summer, the Exit of Goodbyes by authors Mokune Hachi and Kukka . According to information, the animation is from the CLAP (Pompo: The Cinéphile).
Therefore, the direction is by Tomohisa Taguchi ( Akudama Drive ).
Synopsis:
Tono Kaoru heard a rumor: The laws of space and time mean nothing to the Urashima Tunnel. If you find it, walk on and you will find your heart's desire on the other side...in exchange for years of your own life. The night Kaoru finds himself in front of a tunnel that looks suspiciously like what the rumor describes, he finds himself thinking about Karen, the sister he lost in an accident five years ago. To Kaoru's surprise, he is being followed by new transfer student Anzu Hanaki, who promises to help him experience the mysterious tunnel - but what does she want from Kaoru in return? And what will he have to give, after the tunnel ends with him?
The work was published in 2019 and follows young Anzu Hanaki and Tono Kaoru, in front of a tunnel capable of granting any wish, but in exchange, it is necessary to grant a few years of their life. In 2020, the work also received a manga adaptation.
Finally, The Tunnel to Summer, the Exit of Goodbyes hits theaters in 2022.