Remember11: The Age of Infinity

Kokoro Fuyukawa is a girl who has been entrusted with transferring another person to a special psychiatric institution. This other person is a nineteen year old girl named Keiko Inubushi, who suffers from DID - Dissociative Identity Disorder - which caused her to kill some patients in a hospital two years earlier. However, the plane crashes, and only Kokoro and three other people survive. Trapped in harsh mountain weather, Kokoro discovers that she is trapped in a "personality transportation": s...