San and Mayu are two schoolgirls living in Okinawa during the closing months of the Pacific War. Together with their classmates, the two friends are drafted into the war effort as nurses for wounded soldiers. When ordered to die for their country, the remaining members of the group escape only to face the harsh environment of a tropical paradise that has become a hellish battlefield.

Hikari Mitsushima is a Japanese actress and singer. She came to note as a pop singer but went on to star in films. She began her music career in 1997 as a teenage idol singer in the J-pop groups Folder and Folder 5. Although she made her acting debut in 1997 with Rebirth of Mothra II, she did not start acting regularly until 2005. She appeared in manga-based thriller film Death Note (2006) and the well-received Love Exposure (2008), a comedy-drama/art film directed by Sion Sono. Her performance in the latter brought her critical attention and won her several awards.

Since then she has had starring roles in Kakera: A Piece of Our Life (2009) and Sawako Decides (2010), written and directed by Yuya Ishii, whom she subsequently married in late 2010. They divorced in 2016. She has also appeared in the music video for Mondo Grosso's song "Labyrinth" (2017), which has over 23 million views on YouTube as of April 2020.

