Responses
I was actually hoping for this ending. Only sad part would be keigetsu wont be able to be with Reirin brother but potentially the guard? The other alternative if they don't permanetly swap is that Reiren dies, which will be the worst ending of them all... The prince is very much devoted to and understands Reiren and I do believe they deserve a change to be happy together.
im hoping this doesnt turn out with them permanently switching bodies and keigetsu's body (reirin) becoming empress. i feel like the author is steering in that direction, but im hoping it doesn't happen. reasons i think it might:
1) keigetsu feels fine in reirin's body and vice versa, but reirin feels like she's dying in her original body
2) reirin just plain likes keigetsu's body more
3) keigetsu will get away from the unfair hatred if she continues to be in reirin's body
4) the prince marrying reirin (kou) would upset the power balance in the royal court. but marrying keigetsu (shu) would not
5) prince doesn't seem to have a physical problem with keigetsu's body (see his reaction at her sogdian dance)
6) the other consorts want to use reirin's sickliness as the reason she cannot become empress, this stops being a problem if reirin is in keigetsu's body
7) keigetsu for sure has a thing for reirin, and i genuinely think she likes being in reirin's body more (both as a vessel, and as proof of their relationship)
8) leelee will get to be with reirin more easily if reirin is in keigetsu's body.