[Naruto fanfic + sign-in system + salted fish pretending to be a pig and eating a tiger + Susanoo scaling + short-term protection and hot blood + no harem]
Travel through time and become a passerby of the Uchiha clan, and the sign-in system will give you a full-level Susanoo at the beginning. Other people's Susanas are half-body → it takes decades of training to become a complete body. When he wakes up, he becomes a 100-meter giant. On the night when the Uchiha clan was exterminated, Obito's mask was slapped into the ground by a huge purple hand as soon as he took it out. "Who?!" The masked man turned around in shock, only to see a yawning boy riding on Susan's shoulders looking down at him. "Are you polite for disturbing your dreams in the middle of the night?" From then on, Uchiha's genocide plan failed, and the pattern of Konoha was completely rewritten. And that salty boy, who was called "the shame of Uchiha" by the whole village, proved one thing with his actions - if he was strong enough, salty fish could also rewrite history.
