"Decision to Leave": Obsessed with Seo-rae's Wardrobe!

Okay, I just finished watching "Decision to Leave" and I'm still processing...but one thing I can't stop thinking about is Seo-rae's amazing wardrobe. Seriously, that teal trench coat she wears in the early scenes when Hae-joon is interrogating her? I NEED it. I'm usually pretty good at IDing specific brands just from looking, but I'm stumped here, which is killing me! It's so understated but screams expensive and perfectly complements Tang Wei's whole vibe. Anyone have any leads on who designed the costumes? I'm starting a hunt. Beyond the coat, I loved how her clothes reflected her character's ambiguity and almost ethereal quality. The flowy dresses, the muted colors...even the way she layers things felt so deliberate and contributed to the overall 'is she innocent or isn't she?' mystery. The director really used costume to manipulate the audience, and that's my favorite thing to see in a good movie. I also thought the costuming choice of Hae-Jun was brilliant. You can see his sense of responsibility and also his stuffiness and uptightness in the way he dresses. His suit, especially, is so buttoned up. It's very different from her style, and that, I think, is on purpose. It creates a distance between them, even if they are close in the climax of the film. Anyway, besides the killer fashion, the movie was beautifully shot and the plot twists kept me guessing. I liked how even the setting played a part; the misty mountains, the blue apartment. But really, it's Seo-rae's style that will be in my mind for a while. If anyone finds out where that trench coat is from, please let me know!! I need it in my life! Maybe I'll be able to move on with my life, LOL.