Naruto x Demon Slayer: The Uchiha Who Crossed Worlds
Traveling through Naruto, Uchiha Arashi, who has no golden finger, can only survive and develop, hoping to change the fate of genocide. However, things do not go as he wishes. In the end, he is powerless and cannot prevent the arrival of the night of genocide.
In order to survive, Uchiha Arashi had to fight wits and courage with Obito and Itachi, but due to his low strength, he was ultimately unable to escape.
Just before his death, he was under pressure to awaken the Uchiha clan's biggest cheat - the Mangekyō Sharingan. Finally, under the power of the Sharingan, Lan traveled to the world of Demon Slayer and survived.
But how could Lan, who was unwilling to be ordinary and vowed to take revenge, let Uchiha Itachi and Obito go?
When Lan learns the breathing technique, what kind of sparks will be created by the collision of breathing technique and ninjutsu?
(New author, please enjoy the large portion as much as you can!)