I recommend the novel "Divine Priest". The story is about an unlucky person who lives on a low living standard and transmigrated to a new world. He found that he had brought the Priest ability from his game into this world, but there was no Priest in this world. The main character brought along the system's innate divine ability to wander around this world, saving people and becoming a priest. In addition, the novel also had a plot where the protagonist acted together with the rescued little girl and met the mermaid fiancée in the other world. I hope you like my recommendation. Muah ~