The Elemental Challenge Cup is underway! Students from across the academy gather to prove their magical prowess, and all eyes are on Sophia, the perfect honor student and favorite to win. But her younger sister, Mia, refuses to live in Sophia's shadow. Desperate to surpass her, Mia turns to dark magic under the guidance of the dark magic teacher, Morgan. Her talent quickly blooms, and Mia even crushes Luke, the crown prince of a neighboring nation. Even as she declares to Sophia that she'll crush her, doubt eats away at Mia's heart, leading her to sink deeper into the darkness. As things unfold, a mysterious organization watches her, lurking in the shadows. Sparks fly as these two sisters finally clash, and the hidden feelings in their hearts are finally revealed!