Will and his classmates are quickly approaching their last semester at Regarden Magical Academy, which means it's time for the All-Student Praxis. In this ultimate test, students must brave the first ten floors of the Dungeon and take down high-credit monsters. After accepting an invitation to join forces with Lihanna, one of the year's top students, Will plunges into the Dungeon together with Wignall, Julius, Sion, and Colette. But are they prepared for the terrors lurking in the deep?