Barth always staring at Tanrak, intensely. I think he fell first and now wants to make sure the latter feels the same. At this point the roti must the forbidden fruit, because the minute Tan took a bite it all went down!
I never skip the intro for this..jiib jib khun! Moo was hurt all along and never hated Fu. I had always wondered why he was repulsive toward him, when you could clearly see that Fu was trying so hard.
Ko Neung/Orange feels betrayed by his own emotions. He's confused about his crush, suddenly goes to school without him. He can't stay away, instinctively following Ko Song to the store. The change is obvious; he has pulled back so far that even his friends have noticed.
K-Drama 
If he didn't do it then it's YOU! You knew what's in the basement of that house.
Digest.
Investigate.
Critique.
Know.