I teach in Hokage and the system says I am a student of Tsunade

[Congratulations to the host for turning six years old. The strongest Hokage training system is now open. 】
[Task 1, become Tsunade's disciple and become the new Sannin with your classmates Naruto and Sasuke. 】
"What kind of retarded system? I am already twenty-one years old, and Naruto and Sasuke are both my students. How can I still accept Tsunade as my teacher? Answer me!"
[Task 2: Help your deskmate Hinata Hinata get the scarf back. 】
[Task 3: Graffiti on Hokage Rock with your classmate Naruto Uzumaki. 】
[Mission 4: Defeat Uchiha Sasuke and dominate the ninja school. 】
"I'm a teacher at a ninja school. Is it appropriate to do this kind of task? Even if I jump from here, I won't do it!"
[Task rewards: Yin seal, Konoha whirlwind, super beast fake painting, dark art. 】
"System, you win! I am the genius who just turned six years old! Deep Blue adds some points! Let me see your limit!"
Kitazawa, a three-no traveler and an ordinary chuunin, in order to survive to the finale, he taught at the Konoha Ninja School until he was twenty-one years old, when a problematic system came into being, and the ninja world was no longer peaceful.
ps: In a relaxed and invincible style, there are already two masterpieces "Lurking in Konoha, Part-time Hokage" and "Konoha: The Gu Master Creates Hokage". Welcome to collect and read.