Sua tried to support her but watched as she lost her spark and than when she tried to stop mizi from smoking or smth mizi snapped due to her already tiredness and pressure
this is my interpretation anyway
Mizi like the perfect blue movies main girl slowly just lost her spark for everything due to her being severely exploited by the industry as seen in that one scene where we get a close up of her w the camera, she was seen sexually ++
all around and so put with men by the industry so to get more fans for her. That slowly I feel destroyed her inner world and dreams bc she probably didn't think idol world would be like this.
before joining the industry, mizi was gender non conforming and their relationship more intimate while on the stage everything was for the masses to fetishise them. that's how the world infects and strips lesbians of their identities
what makes me really sad is that mizi is completely gone (also referencing how she lost herself in troubles of being an idol shoving sua away) and sua is still there and just trying to be with mizi 💔