SQ14

A pair of friends were supposed to get reincarnated into father and son of a royal family of an ancient chinese empire, but because of some higher being's error, the son, a very dark guy, ended up as a coolie in an indian civilisation, and another girl ended up as the "son". The higher being, realising his error, wanted to rectify it. So after a long long time, when it's already in the modern era, these 3 got reincarnated into good friends. The 2 "mistakes" were given a choice to switch back their roles by clicking an option on the computer. One fine day, after much consideration, the very dark guy accepted the option and became the other guy's son, while the girl became an indian without realising or agreeing to it.

This is a dream, and it caused me to oversleep. In the dream, the very dark guy was 刘青云 and the father was 罗嘉良, can't remember the girl's face but should be some HK actress also.