I Became My Nemesis's Goddess [Worldbuilding]

Jiang Du has a mortal enemy named Liao Qingjiu, nicknamed the Savior of Humanity. Rumor has it he's handsome, powerful, and bursting with a sense of justice. In the apocalypse, he single-handedly founded the Human Alliance, protecting humanity and saving people from the brink of death. But Jiang Du knows what he's really like: cold, arrogant, and utterly despicable. To absorb her Queen's Alliance, he has come after her time and again, pointing at her and calling her ugly, heartless, and immoral. Unable to take it anymore, Jiang Du fights him for three hundred rounds. One moment of carelessness, and she is reborn, back half an hour before the zombie tide erupted three years ago. Remembering how she'd been unable to awaken her supernatural ability and struggled to survive for two years in the apocalypse, Jiang Du cries until her fair little face is red. Then she finds her mortal enemy, Liao Qingjiu, passed out in a hospital. His supernatural ability hasn't awakened yet, either. Just as she hesitates over whether to kill him, Liao Qingjiu wakes up and gazes at her with watery eyes. "Did you save me? You're so kind, like an angel." Please add my next novel to your favorites: Four Hospitals Patient Chat Forum [Infinite] Yu Xiao is terminally ill and has almost no hope of recovery. She's long since made peace with it, spending every day calmly waiting to die. One day, an app automatically downloads onto her phone: Four Hospitals Patient Chat Forum. Four Hospitals? Isn't the local Fourth Hospital a psychiatric hospital? She opens it and sees the first post: [Guide to the Morgue] Yu Xiao: ?? The second post: [A roundup of all the ghosts and monsters I've encountered over the years] Yu Xiao: No wonder it's a forum for psychiatric patients. [Step-by-step guide to becoming a talisman-drawing master!] This one actually seems pretty interesting! That night, horror descends and the hospital is shrouded in blood-red light. An indescribable monster pushes a cart back and forth outside the ward. "Would you like some braised human ribs?" [Welcome to the Hospital Survival Game!] [Please follow the hospital rules!] [Please cooperate with your treatment!] [Please maintain appropriate doctor-patient relationships!] [We wish all patients a speedy recovery and an early discharge~] That night, the ghost making its rounds lifts Yu Xiao's blanket. It touches the talisman beside her pillow and gets struck by a bolt from the blue. The ghost bursts into tears. Why is there a high-level talisman in a beginner dungeon?! Theme: The male and female leads refuse to give up, even in dire circumstances.