Nishimura Taichi and Azuma Rin were normal high school students before the light of a magic circle enveloped them after they dodged a speeding bicycle on the way to school. When the two next awake they find an unfamiliar land with forests and open fields of grass. While they're both confused by the sudden turn of events, things take another turn for the worse as a huge horse with a sharp horn on its head attacks them...
