The protagonist of the story, Luca, moves at the begining of the new semester from a private room to a double room. His new roommate is peculiar and gloomy senior, and he starts to arise his classmates' curiosities.

After that, he has been nominated for the Morning Messenger at the school festival, which will take place 2 months later. It is an important role, which has to do with the mysterious ceremony. Not only he has to deal with this role, he also has to solve seven mysteries of the Academy, which will lead him to the secret of the "Legend".