I was originally going to rate this fan fic three stars. Mainly because I was confused on why the mc was following his sister and the Zenin clans orders so willingly, but that was before I read the chapter where the author explains the sister cursed technique. And the fact, he does get revenge on the clan, boosts the story to 4 stars for me. But besides that, its a well written story, but some of the fights are bland, and you can tell the author doesn't really want to write them and instead, uses them to progress the story. But its still a good read.