
Now I have to watch the drama

Yes, it's different from this manga...
it's shounen aiヾ(☆▽☆)
http://www.mangago.zone/read-manga/cherry_magic_thirty_years_of_virginity_can_make_you_a_wizard/

To think that the backstory is kinda sat itself, we should appreciate our beloved ones.

And for those who said romanticize rape, the timeline is when human rights aren't being on the surface yet. So the lord could do whatever he wants with his servants. Yes, it is cruel but remember, this is a different timeline. Unless you said that sungyeon is raping hosik when they're drunk, then it is wrong because it is on another different timeline. Hope this will clear up some opinion.
I hope the author will explain about his father tho I really wanted to know about it. And did they get another child? Because the doc said hyunseung can't get pregnant.
Recessive omegas tend to get their uterus shrinked, because of which the chances of getting pregnant gets reduced, but it's not exactly 0.