The Secret Agent Married a Son-In-Law, and the Four Fierce Wives Forced Me to Proclaim Myself Emperor.

[Travel time + son-in-law + multiple female protagonists + decisive killing + invincible cool writing + fighting for world supremacy] The top ace agent Chen Feng was stabbed to death by his female boss in the back while performing a mission. His soul traveled to the ancient war-torn Yan Kingdom and became a sick son-in-law who depended on others. The beginning is a dead end! A mysterious treasure map attracted countless murderous attempts. In order to survive, he had to rely on his stinky skin to marry four beautiful women with strong personalities: My childhood sweetheart Little Pepper warms my bed, the richest man's daughter fights for me, the enemy's female general who commands hundreds of thousands of cavalry escorts me, and the noble and invincible and cute little princess of Gaowu is my personal bodyguard... Outsiders only know that he is beautiful and blessed, but they don't know that he is so easy to eat! Court conspiracy? Jianghu killing bureau? Enemy troops approaching? The scorn of a modern-day agent. If you learn mathematics, physics and chemistry well, you will not be afraid of traveling all over the world! Three acids and two alkalis are combined into aqua regia to melt your Golden Palace! Monosulfur, dinitrate, and charcoal will teach you what dimension reduction strikes are! I wanted to keep a low profile and survive, but my wife was too fierce and my enemies were too stupid, so they insisted on forcing me to take action. "Ladies, do you think we should rebel in this world, or should we not rebel?" The four fierce wives looked at each other and smiled, unsheathing their swords: "Husband, lie down at home, and wait for me to conquer the world for you!" Let's see how modern agents use science to subvert martial arts and use gunpowder to dominate the era. With the "assistance" of four fierce wives, they start from a humble beginning and become a son-in-law, step by step to the top of the world! In this world, let me make the decision!