Amazon Japan

Teacher Kawashima Haru takes a position on a remote island off the coast of Hokkaido, where she takes charge of six students. However, she is later forced to leave after an accident occurs. 20 years later, Haru learns that one of her former students has committed a crime, and eventually returns to the island once more.

Neurosurgeon Koichi uses an experimental technique to enter the brain of his beloved Atsumi, who is in a coma after attempting suicide. In his quest, Koichi drifts steadily further into the sweltering marshes of the spirit. It is soon no longer clear what is real and what is not.

Upon reaching the train station to death, a dejected soul is informed that he is "lucky" and will have another chance at life. He is placed in the body of a 14-year-old boy named Makoto Kobayashi, who just died, and needs to figure out the cause of his death.