Hikaru, a high school girl, was seriously injured by bullying and lost consciousness. When she woke up, she was in a coliseum in another world! There, Hikaru awakened to a certain overwhelming talent that she had locked away deep in her heart.

In another world, a state called the Anglo Empire conquers other nations. The women of those conquered nations have two choices: To marry into an imperial family, or to die. At the heart of the Imperial Palace, five stunning beauties collide in a sexy, violent contest to win the Prince's hand.

The strongest final boss of another world, whom nobody could defeat, transmigrates into the body of a bullied high school girl in the modern age!? The unrivaled school life of the demon king of another world!!

Yusuke Yuki, who has spent his entire high school life studying and working part-time in order to keep his special student tuition exemption, finds himself desperately desiring a girlfriend. On his way home, he looks up and accidentally sees a girl attempting to jump off the roof of an abandoned building. A strange encounter leads to a new way of life and a love story with the mysterious girl named Kotori Hatsushiro.