Se Kyung was my favorite, and that might have had something to do with her "youthfulness", she was trusting but don't dumb, and the rest of the characters lived longer so they had more time to get jaded and "secretive"..
this was like The World of the Married's dinner party xD if those characters sat down and talked about the things they've done it'd have created a mess like this ;p

the overall story was that people have "3 lives", and how everyone has a secret life they try to hide, and it's true that no matter how honest we are with our friends and families there must be things we just don't share with every single one in our "circle", but tbh this was kinda over dramatic since it's a movie.

also, they pulled something I hate and get confused over, the "it never happened"... so which part did not happen? the secret reveals, or the ending part?
though they did use the move well to show us not a "what if", but it showed us a true exposition of each character's real nature and story.
like, they could've had a normal dinner party and each would pick up their phones so we could see the secrets, but we wouldn't get the full impact of the weight of those secrets..
but was the end the real truth or was that the "what if" part?

Joon Mo was the worst, plus Ye Jin ;/ everyone else had basic stories, and though it looked big and devastating to them, it felt more like a privileged secrets, things you just don't want to share, not things you want to hide..
but he was cheating on 3 women, and one was his best friend's wife! that was something that pissed me off, Se Kyung acted really well with the way she just walked away and removed herself from the toxic environment, but if the ending was the true story then that means the poor thing has to live with a scumbag like Joon Mo ;( and at the end she'd be the only one hurt becasue at the end of the day the pregnant mistress would appear and no one else's secret would hurt them as much...