A Ninjutsu! Defeat the Pirates!

Hall traveled through pirates and acquired the ninjutsu system. As you master more and more ninjutsu, you unlock more powerful ninjutsu. Water, fire, thunder, wind, earth and various escape techniques... Rasengan, Susanoo, shadow clone technique... Ace: His fire escape is better than my burning fruit! What do I need this fruit for? Garp: Eight Gates Dunjia! A physical technique more powerful than the Sixth Form of the Navy! Fujitora: Tianzhu Zhenxing... I didn't expect Hall to be able to summon a meteorite bigger than me! Luffy: Hall, I want to learn ninjutsu! Hall possesses countless ninjutsu and is rampant in the pirate world! One day, he met Nicole Robin and opened the door to a new world... Hall: Robin-chan, do you want to learn ninjutsu? This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.