Hye Ra or whatever she is called (pink hair not the redhead) really is the worst, she is such a psychopathic bitch, trying to manipulate everyone who likes her, friend or lover. She really needs to suffer for that shitty behaviour, I don't think the redhead is a bad person, just to easily manipulated for to hope of love and attention what she won't get anyway.
And I also agree the blackmail story is shit, rumours without evidence and which are just some gossip and not even something crazy faint in a few days and noone cares anymore. Without the gorgeous art and steamy scenes this manhwa wouldn't have a lot that speaks for it, the plot has to many holes and wasn't well thought through, but still much better than the "The Acolyte" xD