Amnesia

Animation production: Brains Base
Episodes: 12

Genre: Romance, Mystery

Release: Jan 8, 2013

OP Theme: "Zoetrope" by Nagi Yanagi

End Theme: "Recall" by Ray
Adaptation: visual novel game by Idea Factory
Official Site

Story 
On the morning of August 1, the heroine wakes up and discovers she has absolutely no memories of the past. A boy appears before her, and introduces himself as a "spirit" named Orion. The heroine struggles to regain her memories under the guidance of Orion. She then gets a phone call, but she does not recognize the name on her mobile phone screen. She meets her apparent "boyfriend," despite not knowing his face. (source: MAL,) 

Final thoughts: (Spoilers) 

Instead of  placing Ukyou's route at the end, why not set up the whole anime to development Ukyou's route. Because, he seems to have the most important role than any of other guys in the story. Maybe if it went this way, then it would of have a much more better story telling. Although, I am really disappointed with the ending because the second half of the final spends too much time on Orion's explanation. Then, after that, the Heroine doesn't reunite with Ukyo. In the end, it's left up to viewers to decide which path that she wants go to. And, that's it. It kind of feels unsatisfying. Oh well, it was fun while it lasted. I'm just going to pretend that Ukyo and her ended up together and I'll just leave it at that. But I'm still disappointed that this had such an intriguing premise to start with and yet it has an underwhelming conclusion. 
 

                             It's a terrible feeling when the ending leaves you wanting for more.