Akunin-zura Shita B-kyuu Boukensha: Shujinkou to Sono Osananajimitachi no Papa ni Naru
Gray, the B-rank adventurer, was a background character in the RPG known as Bright Fantasy …or at least that’s what he thought. After saving orphans from being attacked by goons, he resolves to provide for them as a father. But one of the orphans is Iska, the other world’s future hero, and his choice will greatly change its destiny.
(Source: One Peace Books)

Captain Corinth: The Galactic Navy Officer Becomes an Adventurer

Tensei Akuma no Saikyou Yuusha Ikusei Keikaku

A Journey Through Another World ~Raising Kids While Adventuring~

My Daughter Left the Nest and Returned an S-Rank Adventurer

The Ossan Newbie Adventurer, Trained to Death by the Most Powerful Party, Became Invincible

Emperor's Mark to Rule the Monsters: Reborn Sage to Strongest Adventurer