The story is set in a quiet rural town rumored to contain the "Urashima Tunnel," a local urban legend. The tunnel operates on the folklore principle of Urashima Taro: time passes differently inside than outside. However, the specifics are inverted. Inside the tunnel, time nearly stands still, but for every few seconds spent within, years pass in the outside world.
The protagonist, Kaoru Tono, is a high school boy trapped in a cycle of guilt and regret following the death of his younger sister, Karen. He believes the tunnel may offer a way to reclaim the past. He soon encounters Anzu Hanashiro, a mysterious new transfer student who is equally isolated and driven. They form a pragmatic alliance: Kaoru wants to save his sister, while Anzu seeks to reclaim something of her own.
The Tunnel to Summer, the Exit of Goodbyes (Japanese: 夏へのトンネル、さよならの出口) is a Japanese coming-of-age sci-fi romance originally a novel by Mei Hachimoku, later adapted into a manga and an anime film (2022). natsu e no tunnel sayonara no deguchi full
Premise: Kaoru Tōno, a boy haunted by the guilt of his younger sister's death and his family's collapse, hears a rumor about the "Urashima Tunnel" — a legendary passage that grants any wish, but in exchange, steals years of your life in real time.
One day, he discovers the tunnel with the help of the new transfer student, Anzu Hanashiro, a quirky, blunt girl who dreams of becoming a manga artist but has lost her ability to draw after a career failure. The story is set in a quiet rural
The Deal: Together, they decide to enter the tunnel. Inside, time moves at a terrifyingly different pace — one hour inside can equal months or years outside. Kaoru wants to bring his sister back. Anzu wants to regain her lost talent. But as they enter deeper, their relationship shifts from allies to something more fragile and real.
Anzu appears loud and confident, but she suffers from artist’s block after her best friend and rival, Koudai, publicly humiliated her. She sees the tunnel as material for a masterpiece. Anzu appears loud and confident, but she suffers
Her development: Through her partnership with Kaoru, she learns that art is not about perfect memories but about capturing imperfect human emotion. Her final manga is not about the tunnel’s magic—it’s about a boy who loved too much.
The film’s non-linear timeline and metaphysical rules can be confusing. Viewers search for a full plot breakdown to understand the ending: Does Kaoru stay in the tunnel? Does Anzu die of old age? (Spoiler: She waits, and they reunite as young adults after Kaoru sacrifices his wish to save her).