Here's a test for your skills. I saw a short scene while flitting through youtube a number of months ago, but I can't remember the title or anything much so I'm hoping someone will be able to identify the drama from my description. I do know that it's Korean. Hopefully my memory serves me correctly...
There are two men and one woman in their mid 20's probably, I think two of them were on one couch and the other on another couch/bench/chair, with a large window background during the daytime. It keeps reminding me of a coffee shop for some reason, maybe because of the window. I believe they are trying to solve a murder case. The woman says that you can tell if a person is good or bad through a kiss, I think, or it might have been that you can recognize a person by their kiss. One of the guys gets up and kisses her to prove her wrong, but she has a reply to prove her theory right.
If you know what this drama is, thank you so much for relieving my mental agony! This snippet of a memory has left me so curious.