One idea could be that the characters from Sword Art Online find themselves in the world of Log Horizon. They could be confused by the different rules of the game world in Log Horizon, especially the unique economic and social systems. For example, Shiroe's knowledge of the game mechanics could either be a great help or a source of conflict when dealing with the SAO characters who are used to a more combat - centered gameplay.
Kirito from SAO might initially be a bit skeptical of the more complex systems in Log Horizon. He's used to a more straightforward 'fight and level up' kind of world. But he could gradually come to respect Shiroe's intelligence and leadership in understanding the game world on a deeper level. Asuna, on the other hand, could bond with some of the female characters in Log Horizon over the shared experience of being in a virtual world and having to deal with various challenges.
Another possibility is a crossover with Re:Zero. The time - looping concept of Re:Zero could be introduced into Log Horizon. Characters from Log Horizon might have to deal with constantly resetting situations and use their wits to break out of the loops and continue their journey in their own world.
First, you need to be familiar with both the Log Horizon universe and the other universe you want to cross it with. Read up on their characters, settings, and rules. For example, if it's a crossover with Naruto, understand how chakra works in Naruto and how the game mechanics work in Log Horizon.
It depends. If the website or platform offering the free reading has the proper authorization from the publisher or copyright holder, then it is legal. For example, some official promotional campaigns may offer free reading for a limited time.
One possible plot could be that Naruto characters are somehow transported into the world of Sword Art Online. Maybe Naruto, with his never - give - up attitude, would quickly adapt to the virtual world's challenges. He could form a guild with some SAO characters and use his ninja skills to fight the bosses. For example, his shadow clone jutsu could be used to confuse powerful monsters while his teammates attack from different angles.
Well, one possible plot could be that the characters from Sword Art Online get trapped in the Pokemon world. They have to use their gaming skills from SAO to survive and catch Pokemon. Maybe they form teams and compete in Pokemon battles in a tournament set up by some mysterious force, similar to the boss battles in SAO.
One idea could be a crossover with "Harry Potter". Picture the SAO characters in Hogwarts, dealing with magic and the challenges of the wizarding world while still having their sword - fighting skills. Another could be a crossover with "Attack on Titan", where they have to fight Titans in the virtual world of SAO. And a third idea might be a crossover with "My Hero Academia", with SAO players having quirks while trying to clear the game.