Gonna be honest, I have a feeling the stepsis is going to win since she's like the 2nd MC, but I hate her with all my being. The childhood friend has been there since the beginning, but this disgusting joke of a character who threatens to drill out her stepbrother's eyes is going to win because...
So what the author is saying is that if you are a pretty girl and act psychotic to the man you like, you will eventually get together with him? Did Yuno Gasai write this or something?
If I was the MC, I would have exploded by now. "You wanna kill me? Do it coward... F****ing end me! You know, if you keep pulling this garbage, don't be surprised if I end up hating you..."