A Powerless Man's Duty

Rio Louis 'Uno' Guia was punished one day for the mistake he committed. Someone came to rescue him and spare his life. This person is Lady Kirsten Tan, she's a daughter of a man from the higher-ups. The Lady has a very kind and soft spot for everyone. She even took him in, nursed him until his health and strength were restored. Uno returned to his master to report but he was shocked to learn that Lady Kirsten was his new target. As a powerless man, he could do nothing but obey all the commands of his master. He returns to the Manor of the Tan to fulfill his mission, and that is to kill the lady who rescued him from death. She did not only saved his dying physical body but also saved his dying soul. What should he do now that he is stuck between his mission and showing gratitude?