Tyrant Oga vs. Poisonous Professor
When the Demon King's dad traveled to the world of Harry Potter;
When a delinquent was at Hogwarts;
When a violent scumbag meets a poisonous professor;
This is the transformation from a violent schoolboy to a gentle dad (is it possible?)
This is a story about raising a demon king to destroy humanity while saving the wizarding world;
This is the story of a violent and neurotic young man who has a newfound love.