Surviving as a Mage in a Magic Academy

Ehan was a stressed-out graduate student who vowed to never attend school again, until he was reborn as the third son of a noble family of mages. But since he isn't the sole heir, he has to make his own path by enrolling at Einrogard, the best magic school in the empire. And although everyone expects much from him, Ehan's time in academia has taught him that getting easy As is the best way to get through school. Despite his lack of ambition, can he graduate as a full-fledged mage?