"I Hear Your Voice" fits your request perfectly. "My Girlfriend is a Gumiho" and "My Girl" are great too. And also "Sweet 18"!
Smile You! It's one of the best dramas I've watched.
nagareboshi - simple, slow paced,touching
Drunken to Love You! ^-^
drunken to love you fated to love you inborn pair
smile you was amazing!!! i never really watch long dramas but i watched each of the episodes faithfully... it was so good that it originally had like 16-24 episodes but was extended to 45 ep.
Goong Rooftop Prince Ojakgyo Brothers Playful Kiss Personal Taste Autumns Concerto Devil Beside You :)
Maybe Prime Minister and I would fit ^^
They've probably already been recommended but Playful Kiss and You're Beautiful follow that and we petty good/cute~ Heirs is also a similar but more dramatic.
i am actually not someone who enjoy this type of romance. as my conscience always pricks me this is not right. this is drama, it can never happen in real life. of all list, you have mentioned, the only thing i enjoyed is full house. plot could actually be ridiculous but execution of that was done right. i could accept that flaw only in that drama
Marriage not dating, mary stayed out all night.
Agree with Marriage not dating and personal taste,

also Taiwanese version of full house I felt flowed better
I third Smile You it is a wonderful drama
On the Wings of Love
http://kissasian.com/Drama/On-the-Wings-of-Love
Rent a Girlfriend Home for New Year
http://mydramalist.com/1586-rent-a-girlfriend-home...
Golden Bride
http://mydramalist.com/1095-golden-bride
Full house ( korean version or thai version their both good, i like the thai version a bit better tho ♥)
http://mydramalist.com/9828-full-house
Padiwaradda
http://mydramalist.com/16323-padiwaradda
Smile, You as mentioned by others.

Marriage Without Dating watched just 1 day ago and it is superb show.