Tao Hun Gongzi

The self-absorbed young nobleman Xi Menyun’s sister ran away from home. As a result, his mother arranged for him to take his sister’s place and marry Bei Tangxiao, her fiance. The foolish Xi Menyun decided to run away as well, but fate is a curious thing, as he ran straight into General Bei Tangxiao’s residence. When he fell into the water, the general reached out to save him, and they exchanged bodies!? This is how their wonderful fate unfolds...

(Source: Kuaikan, translated)