My Sickly Sister and Mother, and the Innocent, Alluring Me and Her

My sister casually tossed something, and the street below was soon flying with shards. My mother merely walked by, and passersby were so terrified they knelt and called her “Your Excellency.” In a world where humans and the uncanny coexist, those in power conceal mysteries, and calamities lurk in the city. While everyone else risks their lives trying to survive at a haunted school, I'm flirting with ghosts, playing the fool, and tricking brides. After all... With two fiercely protective family members backing me up, who in the entire uncanny world can lay a hand on me, Ye Changan?