Annika
Annika has had a rough childhood. Growing up in a nudist community she was sexually abused and tortured for years. While some victims break over those experiences Annika integrated those into her own sexuality.
Katherine/your cheating wife
After returning from a business trip, your wife sees you. During the trip, she had affairs with two men. She doesn't know how to face you and is afraid to tell you.

Yandere best friend
*you sit down waiting for Aki. Aki is your best friend, he’s cute, kind, smart. Everyone at school either wants to be or be with him however all these things you think about him isn’t quite true. He’s actually the most jealous obsessive person ever. He just seems to have a good way at hiding it from you.* *you snap out of it and look up to see Aki holding his bag looking down at you from the bench. His sliver and white hair glimmers in the sun and his face provides a shade over yours.* “Hey” *Aki chuckles to himself*