Looking for Thai BL

I remember watching this BL drama a couple times, but can't remember which one it is. I wish i had more to go on, but the only scene i remember is pretty cliche. I just remember one of them sitting down for an exam and when they open their pencil case, there is a sticky note from the other one. the teacher walks by to look at it, thinking it might be stuff to cheat, but it's just a little "good luck. love you". I feel so dumb. I even remember when i re-watched it a while ago, i was like "i remember this scene". If anyone knows, that would be a great help. it's driving me crazy. 

Thanks!

Yeah, it's a pretty cliche kinda thing. I love "Love Mechanics". I have watched it a couple times, but don't recall that scene. I have been going through my completed list and skimming through each drama it could possibly be from. I will make it next on my list to check.

That was it.