The Ghost Master of Death's Job Arrives

I actually gradually forgot that I had an older brother. That was because... Something terrible happened in my older brother's class. My brother's class teacher turned into a ghost and gave students all kinds of strange homework. If they didn't complete it, they would be punished. In order to find my brother, I entered his school and started doing weird homework... This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.