Apocalypse: I Enslave My Archrival, Then He Bullies Me Until I Cry

[The whole family dotes on her + sweet romance + heartwarming + healing + a little gore + rebuilding a home] [Pampered, willful little princess x her darkened archrival, whose possessiveness has been amplified a thousandfold] The apocalypse descends. Humans awaken supernatural abilities, the dead become monsters, and the whole world cries out in despair. But her eldest brother awakens a spatial ability and stockpiles billions' worth of supplies, all of the little princess's favorite foods. Her second brother awakens a construction ability, and a castle rises from the ground as her private garden. Her third brother awakens a beast transformation ability, and even ferocious beasts adore the little princess. The little princess, Xia Niannian, awakens the ability to enslave others, making her archrival her servant. She thinks she can finally hold her head high, but Pei Xun's scarlet eyes pin her to the ground. He bends over her, his sharp fangs grazing her neck, his frenzied aura leaving her unable to breathe. The little princess bursts into tears. “No, Pei Xun, don't eat me...” Pei Xun gives a derisive smirk. “Call me big brother.” The little princess bites her lip and refuses. So Pei Xun punishes her. Xia Niannian grows frightened. “Big brother, I was wrong. Don't bully me.” “Too late,” the man replies, his voice low and brazen. “Waaah...” The little princess sobs for hours. They secretly love each other, and it's sweet from beginning to end. It's mostly about their romance: after experiencing the apocalypse, they rebuild their home and find hope again. This isn't a plot-driven story; the plot is fairly light, and it's mostly about their everyday romance. No angst.