Doing things like erotic doujinshi to your childhood friend. Live-action version: Satsuki Ena RKI-678

I told my childhood friend, who has feelings for me, "I like you," and used this magical phrase to have my first unprotected sex with her! But I wasn't satisfied, so I even did anal sex! As long as I say "I like you," she will allow me to do all sorts of perverted things like bondage, swallowing semen, and inserting foreign objects into her vagina and anus!