Masono Ema, a workaholic office lady, has a secret nobody knows about - she's a massive masochist with a bondage fetish! Since she couldn't tell her ex-boyfriends about her bad habit, Ema spent her days comforting herself with self-bondage. After an incident, Ema's fetish is inadvertently revealed to her co-worker, Sawatari Rei! This plain-looking man is actually an absurdly curious hidden sadist...? Rei exposes Ema's hidden desires, and everything deeper inside her... "Please be aware that I have taken ownership of you." Ema's heart and body are satisfied with wet, intense penetration, and orgasmic bondage sex. At home, in the office, outdoors... Rei's method of loving is escalating!?