The male protagonist transmigrated from Earth to a different world, became stronger, and then returned to Earth to find his parents. After finding them, he had a sister. When he returned to Earth, he had a sister.The male protagonist transmigrated from Earth to another world, became stronger, and then returned to Earth to search for his parents. After finding them, he also had a younger sister. When he returned to Earth, he had a goal.
This plot was more common and usually involved the male protagonist's background, family background, parents 'storyline, and goals after returning to Earth.
In some novels, after the male protagonist returned to Earth, he might embark on an adventure to find his parents or investigate the situation in the other world in order to reveal some truth. At the same time, he might also bring some specialties or items from the foreign world back to Earth to bring benefits to the people on Earth.
In other novels, the male protagonist's search for his parents might involve his sister. She might become the medium between the male protagonist in the foreign world and Earth or have a special relationship with the male protagonist.
Was there a novel where the male protagonist transmigrated to another world and returned to Earth with super powers?I recommend to you "The Earth's Leading Party". This supernatural novel was written by the author, Bian Tuobo. It tells the story of an ordinary programmer, Chen Zong, who fought his entire life in another world after transmigrating. In the end, he brought the powerful female demon king back to Earth. The male protagonist brought the strength of the other world back to Earth. It could be said that he was extremely powerful. I hope you like this fairy's recommendation. Muah ~π