My Cool Big Sister Always Wants Me All to Herself

[Modern city life + heartwarming healing + found family + aloof older-sister type] After his parents die unexpectedly, thirteen-year-old Gu Yan becomes a burden living under someone else's roof. The first thing he hears from his aloof eldest sister, Shen Qingqiu, is a cold warning: “Don't cause me any trouble.” Just as he falls into despair, a [Heartwarming Journal] quietly activates. [Task: Make breakfast for your sisters] [Task: Clean the house once] ... For the sake of survival, and for that little bit of “warmth,” Gu Yan clumsily learns to cook and clean. Little by little, he transforms from a nuisance everyone resents into a “young homemaker” who leaves his sisters amazed. His gentle second sister and his adorable, absent-minded third sister give him the warmth of a home. And his eldest sister, who calls him “trouble” but clumsily stays up all night caring for him when he's sick, helps him unlock his ultimate talent: [Super Learning Talent]. From then on, a top student is born and a genius awakens. He becomes the “cheat code brain” for a beautiful lawyer, the “muse” of a celebrated author, and the “chief consultant” to a gifted dancer. As the former “burden” grows into a dependable young man who can support his sisters, his aloof eldest sister finally realizes that the boy she once disliked most has, without her noticing, become the warm sunshine she wants all to herself.