I have two ideas in my mind for a new story, they're kind of similar, so would you please help me choose which one would be better and also who should play the role of the leads from my bias groups(infinite, beast, shinee, exo - you can propose anyone for the female):

1st idea: A guy goes out with his cousins, he had drugs and shared it with them, under the influence, they r*ped a girl and he didn't even try to stop them although he was sober. He decides to take responsibility and marry the girl. 

2nd idea: An immature rich boy r*pes on a poor innocent girl who ends up pregnant. His parents, afraid that her gold-digging parents may cause a scandal, force them to get married. Many times, she tried to divorce him, but he threatens to take her son away, what will happen when there's a new man around? And why is he forcing her to stay with him when he clearly doesn't love her nor their son?

Pleaaase, Please answer me!