her younger sister, karen, who is fond of me. at first i thought it was annoying, but… my feelings changed after i started to suspect that the person she was traveling with was a man. my uneasy feelings for her…i distracted myself with your sister… if you’re going to cheat on me, i’ll cheat first… that’s how i felt, but… the act towards karen, who accepts anything, escalated. infidelity, betrayal, sex alone is not enough, blindfold, handcuffs, training, and so on.