Adrián faces a severe crisis after abandoning a valuable class S beast belonging to his academy. The academy demands compensation of ten million dragon coins, accusing him of causing a significant loss. Adrián refuses, but is threatened with expulsion and a city-wide notice that will blacklist him from all academies, leveraging his uncle's authority as the city guard captain. With only three days to pay or face permanent banishment, Adrián is pressured and disparaged by others for his apparent failure. Determined, he vows to obtain a high-class stone to evolve his slime into a class SSS beast, aiming to prove his worth and overturn the accusations.