Help me find pls pls pls

There's this bl manhwa yaoi where the uke has a rare case of being able to get pregnant. Then there's this sunbae of his (who actually was pinning on him) they did the deed when he was drunk from a party. Then he became pregnant, they married, the seme was manipulative but idk. Then, turns out they were connected from the past, they were a master and servant but they can't be together because of traditional values and custom. Then the uke died because of heredity disease on that timeline. Then back to the present why the top is so clingy and has separation anxiety.

I wanna reread it pls the title