Are there any K or J-Drama where the female lead is either mute or blind and has romance in it? It's fine if it's a male lead too, through I prefer if it's the female. Thank you! 
That Winter the Wind Blows. Female lead is blind. K drama.
orange days ---> deaf and mute
kimi no te sasayaite iru ---> deaf and mute
aishiteru tte itekure ---> mute male lead
hanayome no chichi ----> female lead mute (SP)
They look good. Thanks!
It's not a drama and it doesn't have romance, but it's too good not to share (sorry!): Hitsudan Hostess. The (female) main character is deaf + mute and the story is very heart-warming. 
It seems interesting, so I'll give it a try. Thanks for the rec Nezumi!
Hear Me -this one was a surprise.  The drama between the sisters was just as compelling as the romance.
not that much of romance but i got two thrillers. it are movies though.
'Blind' (k- movie) female lead is blind
and the chinese remake: 'The Witness' (where the female lead is obviously also blind)
in both you can kinda get the 'fake brother and sister relationship'
Someone Like You (2015) the male is blind
SPOILER in white (only for the first half)
Page Turner. It does not have romance but it is short and sweet and if you really try, you might see some pre-romance :D
I second Orange Days and Kimi no te sasayaite iru. 

I can also suggest: Ai Wa Mieru (TV special based on a true story)
Bara no nai Hanaya, the lead actress fakes being blind to get closer to the lead actor. I thought it was a really good drama.
Bara no nai Hanaya, Orange DAys, 

Ai wa Mieru (j-movie)
Love me not (k-movie)
Ting Shou (taiwan movie)
Thanks everyone! I didn't think I'd be able to find a lot of drama with this genre. ^_^
Can You Hear My Heart
Aishiteiru to Ittekure