My lovely Gum couple. Love their chemistry. KNG always make KAJ laughs. But towards the end of the drama, KNG becomes very shy. What happened???

Stage 1- During the Press con, KAJ being shy. KNG was very confident and charming.
Stage 2- During the BTS of earlier episodes, KNG likes to tease KAJ. This is his style and he was able to make KAJ comfortable to work with him.
Stage 3- As KAJ was becoming more comfortable around him, she even started to fight back. You can see them fighting like a kid. I think KNG always play around and make KAJ laugh and NG during shooting :)
Stage 4- KNG becomes shy and avoiding eye contact with KAJ. He is so cute. I heard someone says Pisces man sometimes do not know what to do in front of a girl he likes. I hope this is why KNG acting like this. While, KAJ is becoming confident and teased back KNG.
It is so fun to see their roles changed progressively as they developed feelings to each others (delulu mode!)