A twist on a harem

So the basic idea is a group of women, possibly high school aged maybe college, all decide they want to get pregnant by the same guy so that their children are siblings. So they start a club, but it's not just any club, they're looking for the right guy to baby-trap so they make their little club a bit challenging for a guy to gain entry too. Will they succeed and find the right type of semi-submissive/semi-dominant stud they need, or will their plot be foiled?

Naturally we can flesh this out more via discussion, MC would be the guy looking to join the club, not knowing what he's getting himself into. YC would be playing the girls looking to trap him. I don't think there would be a lot of group scenes, mostly one on ones with the others watching to make it easier on everyone. I'm willing to play a few of the other characters as well so we're both doing multiple characters, that way it doesn't all fall on my partner.