Who Gave This Wizard a Part-Time Job?

[Easy][System][Probably Wizard style] Liszt opened his eyes: I've traveled through time, it's a different world, I don't have to go to work anymore, great! Bad news: There are extraordinary creatures in another world, killing people like chickens. Liszt closed his eyes. Good news: Human wizards possess eighteen factions of magic and are not afraid of being slaughtered by others! Liszt opened his eyes. Bad news: You are an Easterner with nothing, no relatives in the Western continent, and two inhuman creatures beside you. Liszt closed his eyes. Good news: You have a system and learning magic is a piece of cake! Liszt opened his eyes. Great news: the system's triggering mechanism is part-time work! Go to work, wizard-sama! Liszt was so hard, it turned out he was like that.