Glenn sleeps through class because he's too busy solving actual magic problems the rest of the world hasn't noticed yet. The show doesn't waste time pretending he's a good teacher, it's too interested in how magic actually works, and why a lazy fraud becomes the only person the school can trust when everything falls apart. Watch it if you want spellcraft that respects its own rules and a protagonist who trolls his students because he's thinking three moves ahead.
Glenn Radars has the worst reputation at the Alzano Imperial Magic Academy. The lazy instructor spends most classes asleep while his students struggle through self-study assignments, earning him the nickname "Bastard Instructor" among the faculty. When his most talented student, Sistine Fibula, challenges him to a duel out of sheer frustration, Glenn loses without putting up a fight. His incompetence seems confirmed. Everything changes when a sinister threat emerges that puts the entire school in danger. Glenn suddenly transforms from a useless deadweight into a fiercely protective force willing to risk everything for his students' safety. As dark secrets about his past surface, it becomes clear that his laziness masked something far more complicated. The gap between who Glenn appears to be and who he actually is grows wider with each crisis, forcing both him and his students to confront uncomfortable truths about strength, sacrifice, and the cost of real power. What starts as a comedy about a terrible teacher becomes something darker and more compelling.