After a short opening segment to the series there was this opening song. After searching for the opening for a bit I found that it was not the same song.
So which song is used and what is it called?
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With user1306322's advice I attempted some searching. And came to the conclusion it was Toki No Mukou Maboroshi No Sora - FictionJunction.
The song I originally kept finding was the opening song of the visual novel instead of the song used in the anime. And the fact I found to be familiar is most likely due to Yuki Kajiura, which has allot of anime songs on her name that I watched.