This Teacher Is Strong! Invincible!

I traveled through time and became a teacher. I have class tomorrow, but I don't know anything. I was very panicked, but fortunately the system woke up. From now on... Painting? I'll teach you. Music? I'll teach you. Make money? I can teach you too! But Jing Ran discovered that there were humans in the school, but not just humans... This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.