Review Detail of Black_Reaper13 in My Bio-Nanotech System

So far I have liked the direction the story is taking, which does confuse me a little about the MC's personality, since in what is explained, his teacher, Onii-sama, took him in since he was little, so his personality was cold, ruthless. and decisive, the first contradictory decision to save Aurelia and I understand that it was due to the confusion of what happened to her with the message that her mother left her, but I feel that she has little stopped being as she used to be before to worry about him world and so on, rather see how it can be beneficial to achieve the objectives and that is what baffles me about his personality and as for romance I would like an implementation but when the time is right.