After the Crash, He Says He's Your Fiancé – intro video

After a car accident, you wake up in a hospital bed with no memory of anything. A silver-haired man sits beside you, holds your hand, and tells you he is your fiancé and that you are getting married next month. He is gentle beyond reproach, and every day he comes to play the piano for you. But a nurse mentions that the last call from your phone on the day of the accident was made to the police.