Taiyo Asano has been on his own ever since his parents died and the only one who seems to care for him is his childhood friend and classmate, Mutsumi Yozakura. But Mutsumi has a secret—she is the head of a family of spies! And on top of that, her brother Kyoichiro is dangerously protective of her! To stop Kyoichiro from killing him, Taiyo and Mutsumi must take the ultimate leap—marriage! Because in the Yozakura family, family cannot kill family.

Earth's God of Destiny lost to Galdardia's Chief God for a bet and chose ten souls to hand over. Galdardia's Chief God handed those ten souls new vessels. Among those souls was Luciel, a salaryman, who fought against his destiny of death.