How Come Those Geniuses Are Fighting over a Useless D-Class?

Lu Mian awakened as a D-class sentinel when he was 4 years old. When he was 10 years old, he was tricked into the abyss while working as a human sacrifice. He finally came back alive and was admitted back to the admiral's home when he was 18 years old. Good news: With one million star coins per semester, you can directly achieve financial freedom! Bad news: Not only did her family have a fake daughter who disappeared when she was a baby, her mother adopted her as her own flesh and blood. As a rare 3S-level guide, her mother even married six husbands at once. In addition to Lu Mian, she also had six half-brothers and sisters who wanted to harm her... As for her cheap father, he died young and became Bai Yueguang in her mother's heart. This also caused the other two, three, four, five and six to hate Lu Mian, the only bloodline left by Bai Yueguang! A few days after Lu Mian entered the house, she was almost raped by the pollution guide who wanted to destroy her; then she was posted on the military academy forum; and she was almost assassinated during the military academy competition... It's so miserable! Wait... Why are you all so bruised and swollen? What? ! Are you saying that she, a useless D-class sentry, beat you, a talented 2S-class sentry, to the ground?