I recommend "The King of Fighters Begins" and "The King of Fighters 'Traversing in the Other World". The former is a novel about a game and a game in another world. It tells the story of a college student named Gou Qi who obtained the check-in system and could travel between different parallel worlds. He picked up the skills of the characters in the parallel world to strengthen himself. The latter is a fantasy novel about a different world. The main character uses the King of Fighters' summoning skills to increase his strength and adventure in the different world. I hope you like this fairy's recommendation. Muah ~😗