It's not gender bender for no reason. The original Korean novel as well as translation on tappytoon and Kindle are a very good read. If I remember correctly Rania is actually Transgender, the first 15 chapters focus on how miserable her life as a man was, and explains the laws of this world.
And most importantly explains how gender bender happened and focuses much more on Rania's feeling to being a woman. And her discovering her womanhood.
I don't recommend reading this manhwa it's very bad in comparison to the source material.