"Since normal methods don't work, we can only rely on technology and ruthlessness!" Uchiha Amahara, who traveled to the Naruto world and was unable to activate his Mangekyō Sharingan normally, embarked on a path of no return. Many years later, Amahara, who had inherited the genes of the Ōtsutsuki God and possessed a pair of Rinnegan eyes, leaned on a giant nine-magatama Rinnegan the size of an asteroid. Looking at the newly resurrected Uchiha Madara, he smiled contemptuously. "You're the only one who still wants to dance?"

This book is also called "Soman: The Demon King Who Started the Naruto World"

[No system + multiple worlds + no qualifications to become Kamen Rider + multiple heroines + Demon King + OOC apology]

My name is Tokiwa Sougo, but I am not the little devil king, nor the old devil king. I am Tokiwa Sougo who traveled to the world of Naruto. I had no inheritance and felt that my life was over. But when I was just five years old, my complaints were heard by the old devil king, and I got an unexpected inheritance.

Tokiwa Sougo: I'm not a knight, I'm a demon king.