Main leads start dating in firsts eps

Hey guys :)

I'm looking for romance dramas where the main leads start liking each other very quickly and start to date in firsts episodes - 1-4 episodes? 

Basically, I'm looking for dramas about the relationship, not about a guy who tries to get a girl for 10 eps.

Any Korean, Chinese or Japanese are welcome! :)

Cheese In The Trap :)

Thank you, guys! :) I already watched Queen In Hyun's Man and I'm watching CITT. I think I need to try Nine :) I'll wait with Kuu until it's fully subbed.

Maybe some of you knows more titles?

There's a similar thread, you might want to check http://mydramalist.com/discussions/recommendation-...
Also want to add Gegege no Nyobo, it's a long drama (150-something eps, but only 15 minutes each) about a married couple. Their romance was more like companionship more than sweet candy or passionate romance tho. Still a great drama.
Not really sure but if I don't remember wrong, in jdrama Pride the couple hooked up pretty early...

Edit: Ah, also Massan I guess (another long jdrama about a couple, I haven't watch this one tho)