The Trust (恩爱两不疑) is the drama adaptation of the popular manhua No Doubt In Us aka Liang Bu Yi from author Lu Ye Qian He, You Zhi Jiao Zi. The story sounds absolutely adorable. Our main couple is the King and Queen respectively. She’s from a general’s family, so she likes to fight, ride horses, archery, while our King is weak and likes to read. She marries him but due to family issues and their complete opposite personalities, they never get along and prefer to stay out of each other’s way. However, one day, they fall in a pool together (she pushes him when he gets too close, hehe) and their souls swapped! Now she’s the King who needs to attend the courtly matters and even go to battle, while he finally realizes his harem is not a very nice place, including his own mother, the Empress Dowager. They see things from each other’s shoes, beginning to emphasize and understand, get close and develop feelings.
You can read the English Translated of the webcomics here. There’s also 2 seasons of animation too.