MTL - Gou Zai Xianwu Marries a Wife and Lives Long - Chapter 177 The ancestor married a wife and took a concubine again! Dragon Girl Reappears, Secret Realm

Li Qingming: “Uncle Master, lend me your Purple Gold Eight Trigram Furnace to study alchemy!”Taishang Laojun: “...”Li Qingming: “Master, lend me your Pangu Banner!”Yuanshi Tianzun: “...”Li Qingming: “Uncle Master, lend me your Zhou Xian Sword Array for research!”Tongtian Jiaozhu: “...”Sanqing: “Qingmingzi, return my Eight Trigram Furnace (Pangu Banner, Zhou Xian Four Swords and Formation Diagram)...”Li Qingming: “Waga ga, let me study for a million years, then I'll return them to you!”

Bai Aoxue, the best mercenary in the 21st century, is accidentally sent back to the Chengxi Dynasty in Great Continent due to an explosion in her mission, and trapped in the first daughter of Prime Minister. After her rebirth, she is set up by her father to marry the 5th prince Jun Yeyan who wears a mask all day long.
In the face of bloodthirsty enemies, discord between brothers, collusion among courtiers and invasion of enemy state, can Bai and Jun resolve the crises? What will happen to their political marriage? How will the fierce battle for the throne end?
With many twists and turns, the book brings you to experience palace revolution, love and hatred thousands of years ago.

- Description from Novelupdates

Qin Guan was reborn and sent back to his final semester in High School 18 years ago. Getting a second chance at life, he works hard to turn things around and eventually become a Prince Charming. What will his life be like the second time around? What will he have to go through? How will he succeed in turning from a loser into a Prince Charming?

Protagonist travels between different anime worlds to right wrongs and uncover his reason for being along the way.