Planning to red this....but I wanna know first.

the story has some difficult topics it talks about, I'd say it's yellow leaning red flag but not in the way most other stories are. but it's not entirely toxic, it's more of the general setting that's rough and what the characters have to go through in order to survive.

They're relationship isn't the healthiest, but the toxicity is mutual. It's a very well written story from the perspective of a mentally ill person. They're both overly attached to one another and they're both flawed.
In a nutshell, it's toxic but it's worth it.