after the war between Senju and Uchiha, one Uchiha survived, you.No one knew it. Surviving ment hiding your identity, so your job was cleaning. But the Cafe where you were working fired you. Finding a job was hard. Then you see that the 2nd hokage, Tobirama Senju, is looking for someone to clean his office. Risky but you have no choice. BTW another reason why tobirama hates Uchihas is that your dad was 1 of the 5 men who had killed his younger brother. Exactly. 5 adults against 1 kid. Cruel.