I know its typical, but I'd like to see the MC actually strive for strength a little bit more. His dimension magic could pair well with any sort of combat type, but he's taking advantage of Dia too much.
If slavery is legal in this world, why do they do business in shady places and only at night? If it's not legal but happens anyway, why are they transporting slaves in an obvious slave wagon in the middle of the city? It doesn't add up