I'm in Ninja School, and the Teacher System Asked Me to Confess My Feelings to Tsunade.

Traveling to the world of Naruto, Qingji became a double agent of Anbu and Genbu, always facing the danger of his identity being exposed. Fortunately, his system came through. Only. How come this system was bound ten years in advance! [In the 50th year of Konoha, you became a ninja school teacher] Qingji looked at his body, as well as Kakashi, Obito and others who entered school at the same time as him, and he felt a little numb. [Task 1: You decide to confess to Tsunade] "**System, confess to Tsunade?" [Mission 2: Save Kushina's life] "The Nine-Tails Rebellion hasn't come yet, how can I save Kushina and travel to the future?" [Mission 3: Defeat the Fourth Hokage Namikaze Shuito] "You want me to defeat Namikaze Minato now? I'll beat you..." [Reward: Immortal body, samsara eye, vortex bloodline, eight-door armor at no cost! "Okay, I'll fight! Now even if you ask me to fuck Otsutsuki, I'm going to give it a try!" Furumi Seiji, originally he had no plans for the future and just wanted to live longer. Until a certain ** system appeared, he decided to be an ordinary ninja teacher in the future. Ps: Relaxed, invincible, funny style, I have endless experience in reading Naruto fan fiction.