All I wanted was to watch porn, but living with my friend's girlfriend Mei turns into an unexpected sex life. She trusts me as a harmless man who would never try anything, while her careless, revealing behavior keeps me in constant torment. Too timid to touch her, I wait until late at night and masturbate to porn while Mei is supposedly asleep. Then she notices what I am doing—and from that night on, our shared life becomes a dream come true.