Love can't bloom between us: Devil and his Twin Sister

Nogami Izumi, Devil King in past life got reincarnated in the magic world ruled by humans. Those humans, whom he hated the most and wanted to get vengeance for the torture and pain he had gone through in his past life with his people and family. With all the hatred in his heart only one goal with in his mind to annihilate each and every single humans brutally just like he had suffered in his past life. But this ambition of his got crumbled under the feet of his own twin human sister, who surprisingly was more powerful then him, his hatred for her and other human being only got increased with time. As this twin sister of his made him, work like a slave and servent to her, in the name of taking him on the right path. "Nogami, you have already died as a devil. And now in this life you are human, so live like a normal person and enjoy this beautiful life yours. No need to go insane and kill others without any reason." Chiaki Izumi, his twin sister said in calm tone witg her expressionless face like a cold stone as she looked outside the window, the cold air blowing her midnight black hairs in graceful way. "No..I won't. I will annihilate each and every humans. They deserve to die, just the way they kill all animals. You told me to be like normal person, every humans hates each other kills and torture those who are weak to them. That's what I also want to do..?" Nogami Izumi said in very deep voice almost like a Devil King inside his normal human body. "Hah..I understand. But you don't need to be bad to others just because they are to you, leave them and enjoy this mortal life. You want this ice cream..? It's good and it would cool you down." "Chiaki-san, these things aren't going to work on me. If you want to stop me, then I am giving you the way. Kill me, I even hate to be born in this pathetic pityless creature or else see everyone die a horrible death including you. Just like those two humans.." Nogami Izumi said with serious tone and devilish smile as one can feel the boundless terror and anger beneath that calm surface. "Truly evil at heart..Will take some time till, I teach him the right path. Hah..such a stubborn child." Chiaki-san thought as she sighed, continuing to look outside at the star before licking her ice cream. She knew that the two humans he was talking about was no other but the very own mother and father who gave birth to them was killed by him, but she doesn't belongs to an ordinary background to get engaged in human matter. Her thoughts and reality were beyond explanation, she can only sigh. In this live, when she learnt about his evil nature and personality of her brother, she felt intriguing as she took oath to herself to make him walk on right path. Although, she wasn't going to extreme level but she thought she would at least give it a try, until this lifetime of her comes to an end. (She have, I can fix him attitude. She didn't know he is in his heart not a random child who would get diverted by some toffees.) Will This Hatred for Humans Of Nogami will change or he continue this till he annihilate every single living being. And will his desire to kill his own sister ruthlessly change..?