I FORGOT THE TITLE

so i very very vaugly remember this one manhwa i read but it was abt this like guy who had a master that was really powerful i think and when he was young he was given to him, blah blah time passes and they fall in love im pretty sure and i remember he gets pregnant and he runs away for some reason and then the top finds him and the bottom is really scared and hes like protecting his baby in his stomach but then they go home and there's something about leadership i remember like the master is a really powerful person and the bottom became a leader as well?? idk i remember it really really vaugly