At a live event Otomate Party 2012, Idea Factory's Playstation Portable otome game "Amnesia" was announced to get a TV anime adaptation.
Amnesia game official website
OP movie of Amnesia game
In the morning of August 1st, a girl wakes up to find she has lost all the memory before the day. A boy appears in front of her and tells her that he is a spirit Orion and he comes to help her collect the memory. One day, she receives a phone call from an unknown man. He says he is her lover. She struggles not to let him notice that she doesn't remember him but...
Source: Picture of the announcement