Yan Xuan is none other than the ruler of the Underworld, the foremost of the Ten Kings of Hell, commanding countless ghosts. But he has one fatal weakness: he's afraid of ghosts, especially ugly ones, ones that pop up without warning, and ones that died gruesome deaths...
The first time Yan Xuan uses a modern shower, the water heater suddenly starts humming and shaking. Thinking a water ghost is at work, he panics and flees straight through the wall into the living room, wrapped in a towel and covered in soap suds, knocking over the coffee table. Su Muqing rushes out with a gun, shouting, “Is there an intruder?!” Yan Xuan blusters, “I-I was just testing the earthquake resistance of your walls!” His ears turn bright red. From then on, he only dares to shower with cold water. His yin energy is so strong that he never feels cold, but Su Muqing assumes he's just trying to save energy and protect the environment.