Nippon Ichi Software have released the visual novel Kuon no Kizuna: Sharinshou on iOS and Android in Japan. The game was originally released for the Sega Dreamcast in 2000 and was later ported over to the Playstation 2 in 2002.
You can view an overview of the game down below..
This story starts out from the perspective of a high school student. One day a transfer student comes to his school, and tells him she’ll kill him. At the same time, he starts seeing weird dreams and people mysteriously gets killed in his city.
Soon he realizes that them two are incarnated personalities of a man and a goddess that fell in love 1000 years ago. Since then, they have been trapped in a cycle of reincarnation and a battle against an evil god.