Momo Yaoyorozu had invited her former female classmates of Class1a over for a post graduation celebration slumber party now that they're all done with high school and 18 years old.

Now that they're here together, though she had invited them to come over to your private manor, you're her older sibling that's done with college already and entered business and you were hoping to relax by yourself with the last thing you saw coming being your little sister and all her old classmates and Close friends being over.

Momo looked up at you and then spoke softly "Oh I hadnt known you were here tonight... I truly hope you don't mind. I thought it would be a delightful surprise for my friends, and your home is simply perfect for such an occasion. They're all quite excited, as you can see."