Naoki was an exterminator in his past life. Now he is in a fantasy world. Without any new skills he continues to just exterminate, but instead of exterminating bugs, he exterminates monsters as his job. How will his life as an exterminator play out?

Kujonin was discontinued due to the author's disagreements with Kadokawa, the editorial department, and the mangaka. Subsequently Hanabokuro's contract with Kadokawa expired in March 2023.