He Was in Uchiha and Assassinated the First Hokage at the Beginning.

Travel through the world of Naruto and awaken the assassination system. I found that my system actually required tasks to enable advancement. What's so embarrassing is that he is just a fifteen or sixteen year old kid from the Uchiha clan, and the system actually asked him to assassinate the first generation! There was no other way. In order to avoid ending up with the genocide in the future, I had no choice but to do it. Successfully assassinate Senju Tobirama and be rewarded with the Eternal Mangekyō Sharingan! Successfully assassinate the Five Shadows, and you will be rewarded with the Nine Magatama Samsara Eye! Successfully assassinate the Immortal of Six Paths, and you will be rewarded with the Death Eye! This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.