Now I just want to know what those side-effects are (although anyone reading this story can easily guess).
We know that if this was happening in real life, Sanghyun would have to tell Yeongwon about the magical gender flip. She would probably want in on the action. Of course, this is a drama, so that won't happen. The reveal will be dramatic. And possibly the result of a Ruha scheme...
There are other obstacles Ruha might not be aware of. Let's not forget the childhood friend who desperately needs glasses...
P.S. Anyhoo, I wonder, if this series were to be adapted, would it be in animated form, or as a live-action series. And if the latter, what actors would play what role? I ask because I don't know any korean actors at all. I don't watch korean dramas.