Nineteen-year-old Marquis Wu Ning Lu Xiao always believed he had a childhood sweetheart named A'Ci. After A'Ci's family perished when she was young, she disguised herself as a man to enter the court and restore her family's honor. A'Ci was exceptionally beautiful but frail and vulnerable, navigating political intrigue while constantly fearing her true identity would be exposed. Lu Xiao did his best to cover for "her," heart aching as he secretly gifted "her" jewelry and dresses, knocking on "her" window at night: "You may not wear them now, but just looking at them might make you happy." He also handed over a box of pearls: "Be good, play with these like marbles. I’ll keep your secret safe—don’t worry." Xie Zhuo: ??? Months later... Lu Xiao stared blankly: "Why is my sweet A'Ci... a man!?" --- All of Luo Jing knew that Lu Xiao and Xie Zhuo stood on opposing sides, hostile as fire and water. Lu Xiao once mocked Xie Zhuo publicly for only writing flowery flattery, while Xie Zhuo dismissed Lu Xiao as "nothing but a pampered noble"—never exchanging a kind word. Yet behind closed doors, Xie Zhuo lay weakly on a sickbed, dark hair disheveled, eyelids tinged red, gripping Lu Xiao's sleeve in pain during bouts of illness before biting his shoulder with trembling breaths... — **[A refined yet inwardly obsessive, frail beauty (bottom)] x [A powerhouse with wild imagination and fierce protectiveness (top)]** --- 1. Fake historical setting, not serious drama—everything’s made up. 2. 1v1, HE. Dual POV. Main POV: bottom. 3. Ages are given in actual years (not East Asian reckoning) to avoid confusion.