Liang Bu Yi

A handsome emperor gets too close to an embarrassed queen, resulting in them falling into a pool together. Then they swap their bodies. The way to swap back is unknown. The most important thing is that the emperor is quite angry now!! Before everything comes back to normal, the emperor has to deal with his mean imperial concubines that he never knows and the queen has to mediate between those ministries...
(Source: Webcomics)