Aoi Isuzu is a 16-year-old girl who just wants a peaceful life. But as the beautiful, rebellious, and top-ranked student known as "Bloody Twilight", she's the most feared person at her high school. She uses her cold-hearted reputation to scare off annoying classmates and unwanted confessions. Her only friends are her goofy childhood companion, Toujo, and his sweet sister, Rika.

Aoi's peace is constantly threatened by bullies (whom she despises) and her academic rival, Fuji Kenji. Known as the school's 'perfect prince', he is actually a Prince of Japan, forced by his father to live a normal, independent student life without royal privileges. Unlike everyone else, he isn't intimidated by Aoi at all. Her chaotic life is set to explode further when a superstar gamer, Daiki, and a famous actor, Hiroto, also enter the picture. All three guys end up falling for the "Bloody Twilight", leading to a hilarious (and not-so-peaceful) fight for her heart, even though she's only got eyes for one.