The one intended to protect

Marcus, a guard of a rich house, has been interested in a new game for sale called “Fantasia” because the functions were unusual for him. The system offered you three different class options tailored to your tastes or what you wanted to be. [Guardian of the capital] [Rare class]. A prestige position you will make sure that no monster or suspicious person passes the gates of the capital at any cost including your life. [This class can evolve]. [Dungeon guardian] [Rare class]. You make sure that no monster leaves the dungeon and that no adventurer passes without paying. [This class can evolve]. [Progressive guardian] [Rare class]. You will start from the bottom of a guard, but you will also be able to climb from the top of the guard job. [This class can evolve.] But the world of “Fantasia” was more than just hunting monsters, manufacturing monsters or waging great wars, you could say that it was child's play. This novel will contain several delicate issues.