I grew fond of her sister Karen. At first, I even thought she was annoying... But when I started to suspect that the person she was traveling with was a man, my feelings changed. My anxious feelings towards her... I diverted them by using your sister... If she's going to cheat on me, I'll cheat first... That was about how I felt. But as Karen accepted everything I did, things escalated. Cheating, betrayal, and sex alone weren't enough, so it progressed to blindfolds, handcuffs, training, and then...
