The 2nd lead syndrome got to stupid levels. The main lead stinks and the 2nd lead is an angel and I have NO idea how anyone wouldn't dump main guy like a hot potato and fall in love with 2nd lead immediately. I had to stop watching because it physically pained me. I've never had to STOP watching a show like that before.

Spoilers for why 2nd lead is better below:

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you've been warned...
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spoilers..
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okay...
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Main lead originally bullies her, basically straight up "tells" her they are dating cus he falls for her, then runs off to another country without telling her why, then gets engaged to someone else, all while stringing her along cus he still likes her. FOR MONTHS (close to a year i think). while all this is happening... 2nd lead is looking after her, driving her places, spoiling her, and even trying to help her get the main lead back (even tho he loves her... he loves her so much he is willing to do that). also she is loved by 2nd lead's family and helps them to reunite and his family helps her find a new passion after she looses her other one. also he knows shed rather have beef than a trip without asking cus he just KNOWS her.