Izure Shinwa no Ragnarok (Light Novel)

Once before, Seven mythical Gods appeared on Earth.Their battle split the earth and tore the sky. 10 years after the battle, the calamity should have been long gone already. However. A boy named Shinsen Raika had his true little sister abducted by a god in the battle and was currently standing in the『Academy』on an artificial island in the distant seas. Here, the night was called as after school time. During that time period, the 『Gods’ Proxy War』 were being held by using Divinity-Compatible people for gaining the seat of the law of world (The supreme God).