The Villainess Is a Mary Sue in the Wasteland

[Not accepting readers. Abandoned. I'm leaving it unlocked because I don't like having branches in my author page.] After natural disasters strike, viruses, ghosts, monsters, alien insectoids, and other horrors hunt the world into a lawless wasteland. Humanity builds five dome walls as shelters against the cruelty of the apocalypse. On the surface, Yao Qinghu is a gentle, orderly, fifth-rank Omega who depends on her older brother. If nothing unexpected happens, she'll have a quiet marriage with a fifth-rank Alpha, have a child of her own, and eventually enter a breeding facility to serve. - Of course, something unexpected happens. Yao Qinghu awakens as a Devourer. On her second day of school, the aloof, cold, pretentious Alpha in her class loses control during his rut. In the sealed infirmary, he tries to mark her. She's a Devourer, for heaven's sake. How could she let some weakling take a bite out of her? This is completely backward! Yao Qinghu decides to stop pretending. She beats him to it and marks him first, then gives him a good thrashing too. Who knew the pretentious Alpha was the city lord's son? Yao Qinghu is automatically expelled from school. Late at night, as she bites the corner of her quilt and works up the courage to complain to her brother, Yao Qinghu receives a strange, harassing message. Yao Qinghu slowly types: ? Premise: Let's move toward the future together.