This is not even a love triangle, the second lead is more obsessed and does not take NO for an answer
Yes indeed. But you he is not arrogant, he is just full of himself. and he is holding on last hope that she might like him back. But he is not bad person or will do anything in jelousey.
She is not his first love. ML never said anything like it and it is just everyone speculation in the series. He sees her as an admirable personality not in a romantic way. Unless I observe wrong.
Because so far there is no indication or scene of past, where one can clearly see ML was in love with her, it was just they in a same club and he respected her a-lot, and because of the accident he was traumatise and her disappearance make him more anxious and worried.
EP#17: Rain comes backs, Phayoo knew alL along. Sun reveals to Kim that they are childhood friends and they make love. Kim faked his amnesia since the start to avoid anyone getting hurt and pretend not know Sun and asked everyone to leave. He orders everyone to leave. The bitch lady office is raided by police and she reaches to summer house and take sun hostage. Kim, Rain and Phayoo fights and defeat the lady while kim get shot in back trying to protect Sun.
EP#18: Kim and Sun reunites, while Kim leaves to pursue his passion for music and achieves success. While Rain leaves for Argentine to see Iguazu fall and sent Phayoo a plain ticket and ask him to meet there. All respective supporting members people finds their partner eventually. Kim returns and Sun travels to an island to meet him, they kiss and reunites on o a boat heading nowhere in the middle of vast ocean.
4 
1 
2 
1 
1 
If that kissed had worked, ML was going to be much easy. But guess writer write like this.
Because so far there is no indication or scene of past, where one can clearly see ML was in love with her, it was just they in a same club and he respected her a-lot, and because of the accident he was traumatise and her disappearance make him more anxious and worried.
EP#18: Kim and Sun reunites, while Kim leaves to pursue his passion for music and achieves success. While Rain leaves for Argentine to see Iguazu fall and sent Phayoo a plain ticket and ask him to meet there. All respective supporting members people finds their partner eventually. Kim returns and Sun travels to an island to meet him, they kiss and reunites on o a boat heading nowhere in the middle of vast ocean.
THE END.
Finally it ended and i can take it off from my CW list.