"Love in the Air"(1) and "Waiting for You to Break Up"(2) follow the same basic plot with the same primary characters, but the details differ quite a bit.
Male Lead: ML plays a more active role in breaking up the FL and 2ML in (2) with some more "green tea" behaviors. In (1), ML only really starts pursuing FL after she splits with 2ML. He is very protective of FL in both version. The romance between FL and ML also progress slowly in both versions.
Female Lead: FL in (1) feels softer than in (2), but there aren't any notable differences that would impact the plot.
Antagonists: The side characters in (1) are a lot more brutal (i.e., ex-fiance's cheating partner (2FL), FL's parents) in their treatment of the FL. They seems like truly morally corrupt people in (1). 2FL is malicious in (1) while more plainly a "green tea" type in (2). FL's parents also seem to only view her as a commodity for their profit, even going as far as to essentially sell her out (reason for their behavior revealed at the end) in (1). While they are still portrayed as selfish individuals, especially the father, they do not appear to harbor any genuine ill will toward FL in (2).
Second Male Lead: 2ML seems to have stronger romantic feelings for FL in (1), though he still cheats and neglects her, while he seems more plainly possessive/scummy in (2). The FL and 2ML also break-up pretty quickly and their emotional basis is also less clear in (1). In (2), FL and 2ML's romantic history from their high school days is shown through flashbacks so it is clear they have loved each other at one point, hence they take longer to officially break-up. FL also learns about 2ML's infidelity differently, also contributing to the difference in break-up timing.
Male Lead: ML plays a more active role in breaking up the FL and 2ML in (2) with some more "green tea" behaviors. In (1), ML only really starts pursuing FL after she splits with 2ML. He is very protective of FL in both version. The romance between FL and ML also progress slowly in both versions.
Female Lead: FL in (1) feels softer than in (2), but there aren't any notable differences that would impact the plot.
Antagonists: The side characters in (1) are a lot more brutal (i.e., ex-fiance's cheating partner (2FL), FL's parents) in their treatment of the FL. They seems like truly morally corrupt people in (1). 2FL is malicious in (1) while more plainly a "green tea" type in (2). FL's parents also seem to only view her as a commodity for their profit, even going as far as to essentially sell her out (reason for their behavior revealed at the end) in (1). While they are still portrayed as selfish individuals, especially the father, they do not appear to harbor any genuine ill will toward FL in (2).
Second Male Lead: 2ML seems to have stronger romantic feelings for FL in (1), though he still cheats and neglects her, while he seems more plainly possessive/scummy in (2). The FL and 2ML also break-up pretty quickly and their emotional basis is also less clear in (1). In (2), FL and 2ML's romantic history from their high school days is shown through flashbacks so it is clear they have loved each other at one point, hence they take longer to officially break-up. FL also learns about 2ML's infidelity differently, also contributing to the difference in break-up timing.
