You read Jinx and then you read this manhwa...
What's wrong with Garam ? He doesnt like rings ? Birthday cakes ? Is he leaving his boyfriend because he has got a big apartment ? Because he defended him against his ex ? against his own parents ?
There should be an exchange: Jeahyuk with Dan (he deserves to be happy) and Jaekyng with Garam to teach him not to break up for nothing.