Slaves ey... Again with this shit! It doesn't make any sense as usual, why are they going to school if they are used as free labor and learning nothing, did their brains rot? It's not like they are in debt because of getting low grades, what is the motivation for them to stay? It's clearly not magic since MC didn't get magiced at all, or put in debt, or threatened even.
Then there's MCs plan. Proving himself strong & climbing social the ladder & saving the world, he already tried this in his last life!!! How about he tries something that wont have him getting fucked over by corrupt nobles 100000 billion times in his new life?
He's not stronger than his last life right? Since he's using the same route as his last life, is the only change going to be him being more careful of poison? Is that the entire character progression in this entire story?