Masamune Izumi es un chico que estudia en preparatoria, pero también trabaja como escritor de novelas ligeras. Colabora con un afamado ilustrador para hacerle las portadas que tiene como sobrenombre Eromanga-sensei y vive con su hermana, una hikikomori.

Masamune comes home from his trip, and Sagiri is happy to see him return. They now await their new novel to go on sale. On the day of, an “Izumi Masamune Faire” is held in a store in Akihabara. While Masamune and Sagiri “explore” the area, they share their stories of how they got into writing novels and illustrating.