[Apprenticeship; Female Lead; Anime Crossover; All Canon Couples Broken Up; System; Invincible]
Main World: Naruto
Merged Worlds: Demon Slayer (Hot Springs, Land of Demons) + One Piece (the sea) + others
As a transmigrator, Sarutobi Xuanyuan panicked when his System suddenly stopped working halfway through. Fortunately, his master was Hashirama Senju, his uncle-master was Tobirama Senju, and he had a good chance of becoming the future Third Hokage. So, to keep his faction stable, he had to deal with the Uchiha Clan's potential threat in advance.
“Xuanyuan, have you made up your mind? I'd much rather you become my Anbu Captain.”
“Uncle-Master, I've made up my mind. Madara Uchiha is dead, and Master is still gravely injured from his battle with Madara. We have to do something to ease tensions between the village and the Uchiha Clan, so I want to take Uchiha Juri as my student.”
“Very well. I'll notify the Uchiha Clan personally in a moment.”
Students taken on so far: Uchiha Juri, Hu Xiaomi (Utatane Koharu), Yakushi Biwako (Biwako Sarutobi), Senju Toka (the book's main character is nine years old), and Uchiha Jinlan (Juri's mother, who helps the protagonist build a covert force)
I'm asking for a tactful book review, as long as it doesn't criticize me.