Hi! :)
That's true!! When I 1st started watching Asian dramas, I was watching rom-coms and most of the time the male lead is too arrogant...I enjoyed the comedy at 1st but after that it started getting frustrating to see the male lead like that!
Well for sweet guy dramas, I'd recommend..
Buzzer Beat
Doctors ---> some people have dropped this drama saying it's draggy but I kinda like it...the guy is sweet and the love triangle isn't irritating and pretty short
Kingyo Club ---> 10 eps and each ep is 20 mins
If you don't mind a few movie suggestions as well..
Virgin Snow
Hear Me
Bangkok Traffic Love Story
Kimi ni Todoke
Oto-na-ri