Sky Fox Star Seal

When everyone is born, there will be a mark on their hand. When they reach adulthood, they can use the mark to summon creatures from different time and space to become their companions. The protagonist has a star-shaped mark on his hand that has never appeared before, but what he summons is a weak and pitiful little fox. All the former partners have left, leaving only the little fox to accompany the protagonist. The protagonist and the little fox grow up little by little, become stronger little by little, reach the peak of life, and open up another colorful world.