Kuon no Kizuna: Sairin Mikotonori Portable

This story begins with a high school student’s point of view. One day, a transfer student arrives at his school and threatens to kill him. At the same time, he begins to have strange nightmares, and people inexplicably die in his city. Soon after, he understands they are the incarnations of a man and a goddess who fell in love 1000 years ago. They have been stuck in a cycle of rebirth and a war against an evil god ever since.