it's probable they won't show a sad ending but a terminal illness has no cure anyway. hope they don't kill her…
The only hope for a HE is that they haven't revealed what the illness is yet so it could be a made up one like "Queen of tears" + the FL father is actively looking for treatments
Imagine your gf/fiancee is murdered and you dedicate half your live to finding the culprit only to find out not only is she not dead but she cheated on you and got impregnated by a married dude...
The emperor =The emperor(joy of life)