"Please, Hero-sama! ~It's Too Soon for the Villager to Become a Hero~"

In the Kingdom of Bayer, people come of age at fifteen, and as a rite of passage, they receive a divine oracle. Though it's called a divine oracle, it's essentially job placement. After all, paying taxes is an adult's duty! In the remote village of Castalnet on the frontier of the Kingdom of Bayer, Mars has reached his fifteenth birthday. Full of excitement, he receives his oracle at a church in the neighboring town, and his suitable occupation is... "Hero"!? However, Mars, who was born and raised in a village without a school, couldn't read...! Never mind that—today is Mars's special day. He needs to hurry back to the village and report the news to his childhood friend Tisha, so he ignores the hero occupation entirely. Unaware of this, the kingdom attempts to summon the hero to the castle and sends a group including a Holy Maiden and a Sword Saint to Castalnet Village. But what stands in their way is...Grandma's teachings!? It's "too early" to turn a hero raised on the frontier into an actual hero.