The need for detectives has dramatically increased in response to the increasing number of violent crimes. This year, a boy and a girl enter Marimine Detective Academy, an ultra-exclusive school, and the only one in Japan that offers the "National Detective License." The boy is Misaki Fujisaki, the grandson of the man who was once known as the "Crime King." The girl is Shia E. Hazeldine, the adopted daughter of the man known as the "Detective King." These two descendants of sworn enemies will meet each other by chance! And as their school days begin, an incident occurs right from the entrance ceremony!? Moreover, for some reason, Fujisaki's score is higher than Shia's, even though she supposedly solved the mystery first... "I challenge you!" "Don't regret this, princess." This is a unique academy story where students compete to find the truth. This is intellectual excitement at its highest peak! (Source: MFBunko J, translated)