No Longer Allowed In Another World Vol. 4

Together, heroes summoned from another world defeated the dreaded Dark Lord--but those very same heroes have become an even greater peril. They've made the world into their playground, using their skills and powers for personal gain. But the melancholy author known as "Sensei" is different. He alone has the power to send his fellow otherworlders back home to Earth. Trouble is, he's an unreliable, unpredictable, and deeply moody fellow with absolutely zero sense of self-preservation. When hi...