So her scene has to be redone or she stays instead of fugging off lel, that'll be fun.
I say leave it as her introduction, but have her pop up in other scenes with the girls and them getting pissed at her as she progressively figures out how to get lewd.
For example, after the intro with Laura's BJ, the next time Kitty gives you a tit job, Gwen pops up and is like "hey its you again, check it out I figured out how to get my clothes off" and Kitty is just like "who the actual fuck, Z?"
And just give every girl a scene like that until she pops up like "Hey so I figured out everything I can do in this game and it looks like I'm stuck here for a while, sooo I'm just gonna enroll at the school. If anyone asks, I'm a mutant, deal?" and from that point on she works like any other character.
I assume Oni has a plan in mind since he's obviously wanted to do this for a while, and I think this could definitely be a fun addition to the game if done right.