Naruto: Devil King of Hell

Passing through the shadow of fire, unhindered throughout the world, beautiful harem, powerful younger brother, tail beast pet, emperors of five countries. Relying on his wisdom and courage, he was able to conquer the world, using his true feelings and gentleness to tame the harem, using his strength and magnanimity to recruit subordinates. Even the strongest would be treated as a pet! Even the five nations call me king!
It's not that I don't want to rely on the System to obtain everything! It is this world that will not tolerate my weakness!
That's why I want to be tough! Stronger than the whole world! Without any help from the outside world, just based on one's own strength, one could become the strongest in the world of ninja!
This world was hell!
And I, am the Infernal King of the Infernal Realm!