Tentei is an average high school student. After being wallflower and having survived the first two years of high school, she was determined to go through it unscathed. She does the same drill every day: She wakes up, goes to school, try to learn, work her ass off then go home. It's supposed to be like that. It should always be like that. Always. But her life suddenly takes a 180-degree spin when the supposedly school's prince just barged into her life all of a sudden. Annoying the hell out of her and making her a very, very violent person. Tentei doesn't really want to be 'friends' or anything with him, so imagine her confusion when he produced a 24-carat diamond ring and proposed to her out of the blue. She couldn't understand, she's just an average high school student. Or so she thought she is.