Akunin-zura Shita B-kyuu Boukensha: Shujinkou to Sono Osananajimitachi no Papa ni Naru

Gray, a B-rank adventurer, believed himself to be a minor character in the RPG Bright Fantasy. After rescuing orphans from an assault by goons, he decides to take on a paternal role and care for them. Among the children is Iska, who is later revealed to be the future hero of another world. Gray’s decision to protect and raise them significantly alters the course of that world’s future.