The story ended at c614. It was cool until the author decided to wholesale some nonsense overpowered skills for everyone at around c500-ish.
Nagasawa crossed to Konoha as Minato Namikaze's best friend. He kept super low key until Minato's appointment as Fourth Hokage where he received a shocking system notification: his life is bound to Konoha's prosperity! In turn, he can use generated prosperity points to improve himself by absorbing templates of powerful individuals such as Whitebeard from One Piece
He subsequently decided to lead Anbu under Minato. He was quite loyal and level-headed. Sufficiently black-belly to keep the comedy running. Mostly low-key but often took explosive moves at key events. Meanwhile, he developed lots of strategies to improve Konoha as he ranked up to be Hokage Assistant (a position similar to Danzo under Third Hokage).
Fun read for some time. But then came the unpleasant parts.
Spoiler
MC could go back to previous template world's origin to collect abilities. The abilities then can be used either by himself or others with the only restriction being his points (that became increasingly easy to gather). Consequently, lots of people in Konoha got Zanpakuto and One Piece fruit abilities.
I was actually happy with the way he adapted Haki and Rokushiki to improve Konoha ninjas. Seamless. After all, they are similar to Taijutsu and Ninjutsu. However, I couldn't understand how the other capabilities (spoiler) could suit the same world.
TL; dr. It was good and enjoyable, although not without weaknesses. If you are a fan of Naruto, you might like it.