Looking at the reactions to this one -- the ratings are all over the place from 2 to 10 -- I can only conclude that this fine tale is suffering from being here on Mangadex, cheek-by-jowl with fluffy, wish-fulfilment yuri manga.
Nothing wrong with Mangadex, or fluffy yuri manga for that matter. This is a good, solid story. If you're still skeptical, try visualising it as a live action film. Fits, doesn't it? The realistic art style goes hand in hand with the bleakness. It's just unadorned reality. I'm guessing that millions of young, queer women felt they had to, and still feel they have to, go down these paths. The story's sticking with the bitter ending is actually admirable and shows integrity.