I teach in Naruto, and the system says I am Tsunade's student

[Congratulations to the host for turning six. The strongest Hokage development system is now open. ]
[Mission 1: Become Tsunade's disciple and become the new Sannin with your classmates Naruto and Sasuke.]
"What kind of retarded system is this? I'm already twenty-one years old. Naruto and Sasuke are both my students. How can I become Tsunade's disciple? Answer me!"
[Task 2: Help your deskmate Hinata Hyuga get her scarf back.]
[Task 3: Draw graffiti at Hokage Rock with your classmate Uzumaki Naruto.]
[Mission 4: Defeat Uchiha Sasuke and dominate the ninja school.]
"I'm a teacher at the Ninja School. Is this the right thing for me to do? I wouldn't do it even if I had to jump off here!"
[Quest Rewards: Yin Seal, Konoha Whirlwind, Super Beast False Painting, Darkness Walking Technique.]
"System, you win! I'm a genius who just turned six! Deep Blue plus points! Let me see your limits!"
Kitazawa, a time traveler with no knowledge of the three worlds and an ordinary Chunin, taught at the Konoha Ninja School in order to survive to the end. When he was twenty-one years old, a problematic system came and the Ninja World was no longer peaceful.
ps: Relaxed and invincible style, there are already two great masterpieces "Lurking in Konoha, Part-time Hokage" and "Konoha: The Gu Master Creates Hokage", welcome to collect and read.