I recommend a Doujinshi novel called "Muye from the Heart" to you. The protagonist was called Yu Chongxin, a descendant of the Uchiha clan, who had transmigrated to the Naruto world. This Doujinshi novel did not involve other anime's ability to enter the game. Everything happened in the Naruto world. I hope this book can satisfy your needs for ferret doujinshi novels. If you like it, remember to tell me. Muah ~