The teacher had his own series?!!!

Really!? What's the title?
ヾ(☆▽☆)

I feel like that's not what the mangaka meant when she said she was glad to draw the teacher. Because I tried looking for more of the mangaka's manga, but none of the characters really look like the teacher. But I'm not sure, because the DOES look like a distinct character, and not mob-like at all lol

There's a teacher? I thought they all were students