Manga Where Main Character is Transported to Another World. Characters in these manga find themselves in a world very different from their own. They may have been suddenly whisked away to a strange world, become stuck in a video game, or are trapped in a different time period. Common themes include trying to discover how to get home, coming to terms with a new life in a new place, or political or social involvement with the local populace. Isekai is a fantasy genre where a person from Earth is transported to, reborn, or trapped in a parallel universe or fantasy world.