Xian Sheng, the beloved delicate darling, has been raised as a princess in disguise since childhood to survive. One day, as war rages and his nation teeters on the brink, he climbs the city walls to cheer for his brother—only to be spotted by the enemy crown prince, whose bloodthirsty gaze pierces through the battlefield, locking onto his stunningly beautiful face. A marriage contract is signed, stirring chaos between the two kingdoms. The Northern Crown Prince craves the beauty; securing him means instant ceasefire. The Southern royal family panics—*you brute, that’s our prince you’re seizing!* To buy temporary peace, Xian Sheng reluctantly agrees to marry far from home, using his fragile health to delay exposure. But Crown Prince Zhan Zhen is ravenous—devouring him with his gaze from day one. The longer he goes unsatisfied, the fiercer his longing burns. Xian Sheng: *…Living together daily—how the hell do I keep this secret?!*