The following simple conjecture
My English is not good. It's all translated
If they really break up
1.soeun Leave the gym
she could only look for model（Since the gang has gone to look for his girlfriend, nothing else is likely to happen）， But the model would only play with her a few times at most, and then be abandoned because the model likes women with boyfriends and she is no longer his type
2.soeun didn't leave the gym
Logically, she shouldn't have left the gym because JH should still have feelings for her and the gym was brought back by her
In that case,Male member and ex would launch a fierce attack on her，She will definitely fall，JH seeing such a scene，They are one hundred percent done，Before the breakup, she could say it was for oppa, but now that they have broken up, she immediately starts to enjoy it, which proves that soeun doesn't love JH,I think the reason why JH broke up is also this. he want to see if soeun can hold on for a while without him,But we all know that she can't resist for even a minute. In the end, she becomes the living signboard of the gym and a plaything for every man
Juhee has appeared
Looking at her final expression, I think the most likely possibility is，She was threatened by the security guard, had sex, and was then discovered by Sangwook,he wanted to break up with her,She came to JH for help，But when she heard that they were also breaking up, she had a speechless expression on her face
Then JH discussed with Juhee about going on a date and having sex, made Sangwook and soeun jealous，Because they were once husband and wife, only when they had sexual relations would Sangwook and soeun be jealous, but they wouldn't break up completely. Only then could they truly make up later（I think this is the greatest possibility）
but
but
but
I find that Muldeok no longer cares about the logic of the plot. Now he only deliberately creates conflicts to make more money
（If you let me have sex with other men, I will follow you，What kind of lunatic could say such words）
So anything could happen later，JH soeun Sangwook Juhee lia ex model sexparty all are possible