I agree she's not the only one to blame but moa does know their Botha brothers ofc she didn't know before
but as soon as she found out she should of set boundaries but She didn't and instead she went and started messing around with both of them i which yura wasn't aware of them.
but you can't really blame yura for pursuing his feelings with moa
when moa Kept pursuing yujin
it's the basically same thing really
but yujin is really the worst out of their 3 of them
bro just doesn't care