Touma was summoned to the world of Naruto by the Fourth Hokage using a summoning technique. With Konoha's help, the power in his right hand was sealed, and he had no choice but to learn ninjutsu if he wanted to survive. Over the next decade, Touma mastered ninjutsu, learned Wood Release through the First Hokage's cells, and even acquired the Eternal Mangekyo Sharingan and the Rinnegan. Once his training was complete, Touma planned to return to his original world, but accidentally ended up in the world of One-Punch Man instead, where he became Saitama's disciple.
From then on, with the power in his right hand sealed, Touma became a postdoctoral ninja. Once the seal was removed, he entered his cheat-mode One-Punch Man state. Damn it, who could still stop Touma from making a 360-degree comeback in Academy City? (Did he flip too far?)
Watch Touma build a harem, gather twenty thousand little sisters, crush Accelerator, and utterly trounce the Western Church.
Touma told the author helplessly, "I just want to become a hero who fights for justice because it's my hobby. I don't want to work this hard!"
(New book: Naruto's Pirate Dream. The title may sound so proper... but the content... this old man can only laugh... My clumsy hands just can't help themselves!)
