The Princess's Man - there is a very painful breakup period when ML leaves FL
Bloody Romance - ML leaves FL only for a short while but it has dire consequences and he definately regrets it a lot
The Wolf - ML leaves FL due to external circumstatnces but later he refuses to accept her and it causes a great pain to both of them
Money Flower - ML not so much leaves FL as he gives up on pursuing her ; he regrets it in terms of mourning the unborn romance but he would still probably do the same
Mr. Sunshine - one of second male leads (all of them are gem!) let's the FL wait for him too long and when he finally comes to her it's too late
Six Flying Dragons - one od main male characters leaves the girl he loves (is chased away by her) in traumatic circumstances and because of that they both suffer later on