Izure Shinwa no Ragnarok  

A Ragnarok to be a Mythology, Izure Shinwa no Houkago Sensou, いづれ神話の放課後戦争〈ラグナロク〉

In ancient times, seven gods descended upon Earth and their conflict caused the planet to split apart and the sky to tear asunder. Ten years after this battle, it was believed that the destruction should have subsided. However, a young boy named Shinsen Raika had his sister kidnapped by one of these gods during the fight. Currently, he resides on an artificial island in the far seas, where night is referred to as "after school time." During this period, the "Gods Proxy Wars" are being waged using Divinity-Compatible individuals in a bid for dominance over the world's laws (the supreme god). On the first evening of these conflicts, Raika was confronted by Brynhildr, a Norse mythological deity. Facing imminent death, he gained the power to seek revenge from the devil eye of Balor through Absolute Domination. With this newfound ability, he vowed to reclaim control of the world from the gods' grasp. Thus begins a new epic saga featuring a heroic protagonist with devil eye powers sworn to exact revenge on the divine beings.