Shounen Tengusa no Shoppai Jumon

is a Japanese light novel series written by Osamu Makino, with illustrations by Sumeragi Kohaku. The series began publication on October 10, 2009 by ASCII Media Works under their Dengeki Bunko publishing imprint.

Synopsis
Tengusa, a boy possessed by an evil god.

The net story is, he was stupid. But he is not the only idiot. Yes, he had a stupid friend. The cool second piece, Suzuki Earth, commonly known as Achan. The third piece of fat and meteor Sato, commonly known as Satoru. The three with strange names were playmates who attended the same high school. One day, a suspicious woman comes to the three who were making a fool of themselves. she said. "I want you to kill people." A bizarre and mysterious case involving a trio of idiots begins.

Can they escape the attacks of cosplayers and beautiful girl hitmen?