[Naruto] Reborn as a Senju: How Do I Become Overpowered?

The main story and the Bungo Stray Dogs bonus chapters are both complete.

Utsu Kuenko never would have imagined that he could transmigrate into Naruto the moment he left his beloved ramen shop after finishing a bowl of ramen. He had even become an ordinary Senju, one of those classic setups with a parent from the Uzumaki clan and one from the Senju clan.

Lying in a crib at Konoha Hospital, he takes a look at a certain Wood Release user who has specially come to visit him to get out of doing paperwork, and silently sighs. Fine, a Senju it is. I just hope whatever being sent me here gave me a huge cheat, or how will I survive the Shinobi World Wars to come?

In the year 67 of Konoha, Senju Kuenko takes his plain, unadorned sword and swordsmanship to the battlefield of the Fourth Shinobi World War. He softly tells the Second Hokage standing beside him with his arms folded, “It's been a long time, Sensei. I won't let you down.”

Please Note: (Read the following carefully before starting, to avoid anything you don't like.)

Additional settings, bonus scenes, follow-up material for the Bungo Stray Dogs bonus chapters, and a synopsis of the happy-ending alternate scenario for those bonus chapters can be found in the author's notes.

① The protagonist has no pairing. Naruto and Sakura will be mentioned later, and there will be plenty of mentions of other canon couples, such as Minato and Kushina. Some parts of the original timeline have been changed. Please consider them butterfly effects caused by the protagonist. Strictly speaking, the protagonist's name doesn't comply with Japanese naming conventions. The author just thought it sounded cool and named him that.

② The writing is at an elementary-school level. This is the author's first time writing, and the characters are extremely OOC. The author doesn't even know what they're writing half the time. There are lots of everyday scenes because the author likes them. The protagonist is a pure-blooded, overpowered protagonist, and only fights battles where things go his way (the fight itself is evenly matched, but the protagonist wins). I'm fragile, so don't flame me.

③ This story is purely written out of love. The protagonist is an OC the author really likes, and the author's knowledge of Japanese swordsmanship is limited, so please don't scrutinize technical details. The sword techniques in the story draw on Rurouni Kenshin, Demon Slayer, Sekiro, and some real-world kendo techniques.

④ For plot reasons and because of the special period in which the protagonist is born, there will be many original characters, and some canon characters' family relationships will be made up. The timeline will also diverge significantly from canon in some places. The protagonist cannot change major plot points. If he reveals the future to others, the people involved will die sooner.

⑤ The ending is happy. The protagonist's original world is Bungo Stray Dogs, and there are Bungo Stray Dogs bonus chapters.

⑥ The timing of the First and Second Shinobi Wars is uncertain. The story's setting is that the First Shinobi War was a local conflict and did not affect Konoha while Hashirama was alive. Its direct consequence was that Hashirama decided to convene the Five Kage Summit and use the Tailed Beasts to achieve a balance of power. Certain events, such as Uchiha Setsuna's rebellion during the Second Hokage's era, were altered by Kuenko's butterfly effect. In the original story, Tsunade and Nawaki were never said to have the Senju surname. In this story, Tsunade and some clan members chose not to inherit the Senju surname and instead assimilated into Konoha, while Nawaki chose to inherit it.

Theme: A Cheat's Training Manual for Another World