Xu Che, a teacher at the bottom of the rankings, is mocked by the entire school and told he is only fit to take in useless F-rank students. Everything changes when his Master Teacher System awakens. To his shock, he discovers that the three F-rank female disciples everyone looks down on are actually hidden SSS-rank powerhouses! One evolves on the spot after eating a bite of a ferocious boar's leg when she's starving, another conceals Violet Heaven Divine Thunder within her body, and the third grows stronger the more she eats. While the entire school waits to see him get kicked out, he turns the tables and transforms his F-rank students into the strongest team around. Stop pretending—you are all SSS-rank!