April 1st, 2236 A.D. Ninety-nine unread messages, all from the same sender. In 2231 — five years before the game begins — humanity developed telepathy as a new form of communication. Yotsuba noticed one girl who never used it, keeping herself closed off from everyone. One day, tracing a Phillips-head screwdriver back to an abandoned manor near his home, Yotsuba enters and finds something the human race chose to forget. 2236 A.D. is a visual novel about the gap between past and future, and what lives in the space between them.