Nilo is 896 years old in the past a dangerous demon that everyone was afraid of but one day he found a small crying angel in the infernal wasteland he needed to kill him for being here but he closed the angel with his imperceptibly brought wings at home so several years passed and the angel grown up Angel calls him brother unaware and not caring about the past while Nilo sometimes wonders if it would have been better to kill him then and what will happen — has the baby returned yet?