Just a theory based on the logic of the story so far, I think (whatever the guys with the dead brother is called) got the girl addicted to drugs, then promised she's get more (probably saying uke said he'd do it, since all three of them used to be under the same house she most likely took his word for it and wasn't in a clear state if mind anyways) if she did what she did. (Does this make sense? ૮꒰ ˶꒦꒳꒦˶꒱ა I don't remember any of their names haha) I'll be so mad if seme breaks his promise to uke of never leaving him, even the thing about how he wouldn't blame uke if he burned the house down or whatever he said...
╥﹏╥ ahhh
fuck why did tht bitch did tht, maybe was it the guy who said tht, or was it the bitch who wanted to do tht in order to save herself, anyways ahjin poor him, hope he'll be okay