Fate / Ambient Heart

After the events of the 1st fake holy grail war, a lucky individual is selected to participate in the second and hopefully last ritual. She is but an average 10th grade student of her family who has given a Servant by her teacher to replace his role of being the master of Rider in the current ritual. Given only by the name of Ozymandias, Rider sees to it that he will win the ritual, regardless of a E- Rank Master.