No Longer Allowed in Another World Vol. 3 (manga)

Sensei doesn't exactly fit the normal mould for an otherworldly hero: Moody, quirky, and weirdly comfortable with death, he seems much more interested in finding inspiration for a new novel than in doing anything adventurous. Yet when the fallen hero Kaibara the Glutton terrorizes Princess Matilda, Sensei can feel the seeds of an intriguing story starting to take root. Even in the face of overwhelming power, perhaps his pen really is mightier than the sword!