In this world is only have 2 genders, one is a male and one is a female but in this world, they have a female who can't get pregnant and a male who can get pregnant. Both of the types often to be seen as a failure in society, people will talk bad about them especially for a male who can get pregnant. The world still not fully accept a gay relationship and for a male who can pregnant they do not have the choice to be pregnant without being gay, that is why many of male who is diagnosed to have ovary is took the surgery to remove their ovary even they are infertile since life will be easier for them. 

they are being called as 'pregman'.

The surgery is not cheap so it also has people who just accept their condition or hiding their condition, the medicine to control their period is cheaper. the pills are called 'omega pills'. omega pills are helping the pregman to have their dead egg out, different from a woman they can't naturally bleeding. pregman eggs are clogged on their ovary and need the medicine to help it unclogged and make the blood stringy or look like a gel so they can push it out on the toilet. They usually have a sign of fever and cramp around their tummy whenever is the time for them to take the pills.

And Kim Heechul