You're Too Much (2017)

Both are Makjang Dramas. Both have a wealthy family that is tied to a poor family. Both have a main character that deals well with a disability and plays piano. In Can You Hear My Heart it is Deafness and in You Are Too Much it is Blindness.
Differences:
You Are Too Much will be 50 episodes and is categorized as Drama, Family, Music - Music business is featured
Can You Hear MY Heart is 30 episodes and categorized as Family, Melodrama, Romance. - Romance is featured
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The dramas are very similar in that they both deal with overbearing families, both dramas have a grandma overseeing things, and both have lots of shady things done by characters to backstab each other, get ahead in life, etc.