I Am the Hell Teacher

As a teacher, I should lead by example. Ahem... I'm out of ideas.

After arriving in this world, I was supposed to be a well-behaved biology teacher. But my right arm mysteriously turned into a monster's limb. Whenever ghosts or spirits appear, it starts to grow abnormally hot. The only way to relieve the symptoms is to subdue them, which also earns me rewards. And so this world gained another hellish teacher, walking between the realms of Yin and Yang.

Wandering spirit: He's a good person. He helps old ladies cross the street, returns lost property, and stands up for the weak...

Vengeful spirit: He's a bad person. He grabs us and throws us into reincarnation without exception, and bullies us...

Malevolent ghost: You have far too good an impression of him. He's scarier than a ghost, with a hand that reaches the heavens...

King of Hell: What kind of being is this? Is he invincible or something?

This novel and its characters are entirely fictional. Any resemblance to actual people or events is purely coincidental. Please do not imitate.