My Dad Defected to the Enemy, So I Used a Life Simulator to Slay Him!

This is a heartwarming story about a young man who works hard in silence, all so that one day he can kill his own father. When other people transmigrate, they're heirs to divine dynasties or get to warm an empress's bed. At worst, they're high school boys, the absolute best. But then it's my turn, Qi Yun. What! I get my brother as a reward from the start? What!! The System ate my beginner's gift pack from the start? What!!! My dad defected to the enemy from the start? What… I'm sent to the battlefield from the start? You've got to be kidding me! How am I supposed to play this... But luckily, Heaven hasn't forsaken me. It gave me a grandmother. In that case, let's see how Qi Yun dances against the odds, turns the tables when all seems lost, and becomes the guardian deity of Huaguo!