Akira's manga / #Bullying(5)

The protagonist is a quiet and boring profesor that almost never say what he thinks because he's "traumatized" by something that happened in his childhood. One day his high school bully moves next door and then the story begins. The story is nothing special and the characters aren't either and how the author shows the "trauma" of the uke feels ridiculous, a story to read once.

The protagonist wants revenge on his bully, so he asks his occultist sister for a potion that will make his bully suffer.