Something in the Rain aka Pretty Noona Who Buys Me Food- Currently airing and best noona romance I've seen.
I Need Romance 3- Really good noona romance although the leads take a little time to be together.
Last Cinderella- Japanese drama the leads have awesome chemistry and awesome skinship.
Like for Likes- Korean movie. It has 3 main love stories and one of them is a noona romance.
LOVE- Taiwan movie, it also has different love stories and one of them is a noona romance as well.
My Only Love Song- She's his noona by 2 years but it's not really a main part of the drama. It's just mentioned (in real life she's younger than him).
Who Are You (2013)- They are both cops and she's his superior. She can see ghosts.
You're All Surrounded- She's his noona by one year or two in the drama (she's younger in real life) it's a detective drama.