26 Years Diary (Japanese: あなたを忘れない Anata wo Wasurenai; Korean: 너를 잊지 않을거야 Neoreul Ijji Anheulgeoya; literally "I Won't Forget You") is a biopic that tells the story of Lee Su-hyon's life and death.

He died on January 21, 2001, along with a Japanese photographer, Shiro Sekine, while both were trying to save the life of a man who had fallen onto the tracks at the Shin-Ōkubo Station in Tokyo.

The soundtrack of the movie is the song "Okizarisu" by High and Mighty Color.

The film is based on a true story, Soo-hyun (Lee Taesung) travels from Korea, studying in Japan he meets Yuri (High and Mighty Color's lead singer, Maakii).

Both share similar interests in music and sports as they become closer while dealing with language and racial barriers.