What's the meaning of Choi Yeon's "Swing" music video? How come all those women become herself at the end?

It's about a boyfriend who doesn't care about her, a shy woman who didn't really go to clubs, and then she goes to clubs and has another love interest, and her heart starts to swing, and she starts to change, and she's between a lot of guys, and that's it, and I can't explain it exactly, but if you look at the lyrics you'll get the idea of the music video

You've always been able to just deal with it that way.

And I can't even get an ordinary flower these days

How come you don't understand the reed in a woman's heart

Old lovers don't care about anything

I want to swing, I always want to swing, and another love is on the way

I'm being swung, I'm being swung, and someone's seducing me with colorful surprises

So, I want to swing now, I want to swing, and I want to swing, and I want to swing, and I want to swing, and I want to swing now, and I want to swing now, and I want to swing now. I want to swing now I'm not married to you either

So I want to swing all the time I'm going to walk away from your tiresome love

Please show me me me me me me me me me me I'm swinging

Please show me me me me me me me me me me I'm catching me swinging

Men don't give bait to the fish that's hooked on

That's why lately you've been treating me so badly.

So lately you've been ignoring me

It's so sad that even though I've changed my image

Your half-open, half-closed eyes are looking away

I'm trying to swing, always trying to swing, and another love is on the way

I'm being swayed, always swayed, and someone's luring me with colorful surprises

So, I'm, I'm, I'm, now trying to swing and I'm not even married to you

So I, I, I, I, I, I, I, I'm trying to swing now.