they both have a similar disease (one that affects the motoric nerves). Slowly but surely everything will be taken away from them (to be able to walk, eat, talk, ...). Though there is no available cure, the 2 of them try to live there live the fullest instead of wallowing in despair.

Though the problems in these dramas are the same (sickness, love, friendship, family, work/school), they both have their unique storyline.