The Princess's Emergency Husband

Aiden Qin encounters Grand Princess Isabelle Lockwood in The Qian Empire. Prince Quentin forces marriage. Isabelle recruits Aiden as her Prince Consort. Aiden activates the [Empress Assistance System], becoming a master. He captures a Spy, uncovers Roderick Linden's conspiracy, overthrows him, becomes Marquis. Thwarts Northern Yan's plot, quells Quentin's rebellion, appointed Grand Marshal. Defeats Northern Yan's army, helps Isabelle ascend, promoted to Peerless King, achieving a perfect ending.