Chaos with Delivery. For Professionals

I promised to take revenge for my parents. But their killer is still at large and continues to commit crimes. Now he is ready to destroy what little I have left. I promised to translate the ancient grimoire. But it holds the secrets of my family and the history of demon summoners. I need answers – but I am afraid of them. Who was the creator of Demonica... and who am I? I promised to send my demon home. But how can I forget his touch and leave him forever? I swore that I would do this for him, but will I be able to? But I promised – and I will keep my promises, even if it costs me my heart, my soul, and my life.