Seinen tag gives me hope this isn't a "pseudo-evil" protagonist who's only evil in name. Maybe he'll grow to actually be an evil king as the title says.
PS: he looks way younger than 18 years old.
Because he's pretending to be a regular explorer (he's main class is a hero) regular people in this world don't just become mages, only select few can.
In other words, it's like seeing a bus driver suddenly ride into a helicopter and fly away.
The translation is terrible, but I guess beggars can't be choosers. so thanks anyway
I would recommend this manga it's very interesting and lives up to its seinen tag.