Five years ago, Haruki was separated from his brother, Hiroki, in a freak accident. Believing him to be dead, the family have moved on, though the young man has always felt responsible for his older brother’s death. Now, on the day that Haruki is due to start his new job, Hiroki appears on the doorstep claiming to have had amnesia. Is he the real thing, or is this all just a cruel April Fool’s joke?