I Came Back but the World is Still a Fantasy!?

When a boy coincidentally fell into a dimension hole, what awaited him was a world of sword and magic. Two years of tragedies, wars, and schemes, passed until he was finally able to return to Earth. But when he came back, the world was no longer the same. A new world with advanced technology, Garesto, was now trading with Earth, leading to a complete overhaul of Earth’s technology. In the long years that have passed and the great changes that have occurred, his family was not left untouched. His parents were now divorced. His siblings were now strangers. And all his friends were now gone. He who possessed otherworldly power and knowledge hid himself for various reasons. But though he w...