https://www.youtube.com/watch?v=RQy54gw-pls
Here is my explanation of the story depicted in this video:
Seohyun walks into the restaurant with a girl in a white dress. It appears they’re looking for a person or people in particular. Their view is obstructed. If they would just walk a little more into the restaurant then their view would not be obstructed. Thus, it appears that they are trying to hide. They peer around the obstruction, with their bodies bent. This is further evidence that they are trying to hide.
They see a man sitting across from a girl in a red dress. The white dress girl sees this couple and she gets upset. It’s implied that this man is her lover. And that he’s cheating on her with the red dress girl.
(From what we see later it appears that Seohyun learned about the cheating before the girl in white did. Seohyun told her about it. And, to prove it, they decided to go down there and catch him in the act.)
Seohyun communicates his cheating to Tiffany via smartphone. Tiffany tells Hyoyeon about the cheater. Tiffany walks over to Taeyeon. It appears that Tiffany and / or Seohyun are using their bodies to obstruct his view of the girl in white. She (or they) don’t want him to know that the girl in white is there watching him cheating.
Tiffany calls Sunny and tells her about the cheater. (It’s possible that he hears this conversation. And yet he doesn’t seem agitated and so perhaps Tiffany is communicating in a language that he doesn’t understand. Like, Korean.) Taeyeon is right there in front of Tiffany and so she clearly hears about the cheater as well. Yuri, Yoona, and Sooyoung also learn about the cheater. (From Tiffany’s conversation and possibly Sunny saying something to them.) Jessica is the only one of the 9 not to know about the cheater. And so Yoona walks over to her and tells her about it. While she does that, Sunny walks in front of him. She stops between him and the girl in white. Thus, as with Tiffany and Seohyun previously, it appears that Sunny has repositioned her body with the sole purpose of blocking his view of the girl in white.
Our 9 lovely angels are sorceresses. They decide to use their magic powers to punish him for his cheating. (They didn’t use their magic on him until all 9 Girls knew he was cheating and so it’s possible that they first consulted with each other on how precisely they should punish him.)
When we next see him his chair has been moved. All the other furniture is gone. People are gone, too. Only he and the 9 witches remain. It appears that the Girls have used their magical powers to make these things disappear.
He’s sitting down. And he’s calm. This is strange. Shouldn’t he be freaking out? It appears that he has been immobilized. Is he under some sort of spell? Some type of mind control?
Hyoyeon blindfolds him.
A hat magically appears in Jessica‘s hand. It appears that this is the same kind of hat magicians use in their routines.
Next we see him in a different room. Four of the Girls are there. He’s walking and so he’s clearly not physically immobilized. (However, it’s possible that his mind still is.) The Girls lead him to an upside-down hat. This hat looks very similar to the one Jessica just held except it’s like five times larger. It appears that magic was used to make Jessica’s hat bigger. (Or, less likely, that he and the Girls were made smaller and transported to a small room. The hat, however, was not shrunk and so now it looks huge by comparison.) He gets into the hat. Yuri touches his forehead. The five of them are engulfed in a swirling magical light. They disappear.
He reappears as a rabbit. He’s inside an upside-down hat held by Jessica. It appears that this is the same hat that she was holding earlier. The reason that hat was increased fivefold was only because it needed to be large enough so that his human body could fit inside it. But once he became a rabbit then such a large hat was unnecessary. He can easily fit inside the normal version of the hat. And so that’s why the hat was returned back again to its normal size.
One classic magic trick is to show the audience an empty top hat. And then, to pull out of it either a rabbit or a bouquet of flowers. Thus, it appears that the Girls are referencing that trick with their magic. Of course, our 9 goddesses are NOT stage magicians. Instead, they’re REAL magicians.
He hops off of the hat. (Or Jessica accidentally drops him.) He ends up on the floor.
He magically returns to his former human self. The Girls laugh at him. He’s upset. If he was under some sort of magic spell before which made him calm then that spell has now been lifted.
He tries to move towards Sunny but it’s like his feet are nailed to the floor. He looks down. From the thigh down his body has changed into a tree stump. (Or possibly, that his body is INSIDE the tree stump.)
He can’t fight them, they’re clearly too powerful, and so he begs them for mercy. He has his hands together like he’s praying. His hands magically turn into women’s feet.
Next he finds himself inside a cannon. It appears they’re about to blast him to bits! Taeyeon holds the lighting torch. She lights the cannon’s wick. It burns down. Yoona snaps her fingers. This causes some sort of magical discharge.
He reappears back at the same place and time where we first saw him. The Girls are back too, doing what they were doing then. Except for Seohyun. She’s no longer with the girl in white. That girl is gone. Instead, Seohyun is sitting across from Taeyeon. The girl in red is also gone.
The girl in white walks in, alone. She waves and smiles at him. He smiles and waves back.
If either one had remembered what had just happened then they wouldn’t be smiling. It appears that history has been rewritten. The girl in red was edited out.
The girl in white sits down across from him. This is the same spot originally occupied by the girl in red. Thus, the girl in white has replaced her. Literally and figuratively.
The Girls look at the couple. Both of them appear to be very happy. The Girls are happy with this outcome.
In some religions and cultures white represents Good. And red represents Evil. This is true for Christianity. The white angel versus the red devil. It’s possible that this symbolism is being used in this video. If this is correct then it implies that the girl in red knows that he’s cheating. He didn’t lie to her and say that he’s not with anyone. She’s a villain and so that’s why her dress is red and only red. The other girl is Good and so that’s why her dress is white and only white.
If he had been cheating for some time, to a high degree, then it appears he wasn’t punished enough. Thus, it appears that his date with the girl in red was the very start of his cheating. Perhaps—the first few minutes. That’s why his punishment was so light. He DID cheat. That’s bad. But it didn’t go very far.
If he was happy with the girl in white before then why did he cheat on her? It appears that the girl in red is more attractive. Perhaps he was tempted to cheat, in part, by her superior attractiveness.
Why did the Girls edit the girl in red out of his life? If she’s a villain then that might be her punishment. If she’s NOT a villain then maybe it’s because the Girls know that she’s not right for him. Their magical powers might inform them of this. Perhaps they can see his future with her and it ends in failure. Divorce, perhaps. But if he ends up with the girl in white then he will be happy. And so will the girl in white.
However, it’s also possible that the opposite is true. He might be happier with the girl in red, but the Girls wanna make the girl in white happy, and so they direct him back towards her. Why do they wanna make the girl in white happy? Why did Seohyun tell her about the cheating? It doesn’t appear that Seohyun is a detective, it’s not her job—so what does she gain? The girl in white might be a friend of Seohyun’s. Perhaps Seohyun owes her a favor.
But I digress.
