Spoiler!
Not really. Jiwoo got angry and jealous over the new guy, but the reason for their break up was much worse. (MAJOR SPOILER AHEAD!!!)
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Jiwoo humiliated Eunsung infront of Minji and her bf by saying he's only dating Eunsung for the s**, nothing else. So Eunsung broke up with him and moved out of their shared apartment.
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Jiwoo humiliated Eunsung infront of Minji and her bf by saying he's only dating Eunsung for the s**, nothing else. So Eunsung broke up with him and moved out of their shared apartment.