It's obvious I started it because I wanted to finally watch DBK but wanted to know all Pete's and Kao's story and this should help me understand more their relationship but I ended up even more confused ?
The whole time I did not understand why Pete is so irritated by Kao and then out of sudden he started to be dramatically jealous seeing him with someone else. Tbh, Pete's character is pretty confusing by itself. I don't know if he's smart because he confronted his problematic ex he wanted to get rid of so much and dated her again because he thought he's jealous of her and then broke up with he again and she obviously wanted a revenge. It was so dumb move imo. In this series I'd be definitely Kao because he was as confused as me. Pete was attacking him for no reason and was meddling with his personal life and did not want him to see his friend Sun even though he did not even know how he feels. Then when he got into argument with Kao because of his behavior, he admitted he likes him, aggressively kissed him without consent and slept with him. Kao might had not pushed him away but that could be out of shock because he seriously had no clue Pete thinks about him this way plus Kao himself had feelings for him but it doesn't mean it was okay. Then Pete apologized for it and wanted to act like nothing happened but he still could not see Kao with someone else so he wanted to make Kao date him. Kao did not want to give up so easily and played hard to get because he knew how Pete is and could not trust him. He always threw his girlfriends away like some trash when he got tired of them just one might have cheated on him but with his personality I'm not even surprised. He's too jealous and aggressive. And he really hurt Kao when he wanted him to leave his friends so they don't have to see each other.
Kao is just too kind so he did everything Pete wanted but ended up being hurt. Pete even accused him of taking advantage of situation and stealing his ex. It really hurt since Kao already had feelings for him and Kao himself did not know what he should do to make Pete stop being angry with him.
In conclusion, Pete just don't deserve Kao. Kao is too kind, naive, obeying, cute, boyfriend material as he really cares about others. While Pete is too selfish, possessive, violent, careless, jealous...
Yes, he started to change at the end as he started dating Kao but I hope he'll change much more in DBK because if he hurt Kao just because he was spending his time with other man... it's abusive relationship and that's wrong.