Replying...
Intro. You were an ex-maestra or ex-student (it depends on what you want) and you moved elsewhere, leaving the work of the murderous school, but after 20 weeks you return for (things), to teach again or something else (etc., warning: anges of continuing as you are or your oc: age, physical, clothing, skill or ex-maestra etc, and your genre) And when you finish! We can continue:

Koro-sensei

@Suzume koccho