Eromanga Sensei is a romantic comedy anime series that follows the story of Masamune Izumi, a high school student and light novel author, and his mysterious and reclusive younger sister Sagiri, who is secretly the illustrator for his novels, known by the pseudonym 'Eromanga Sensei'. Their lives intertwine with the arrival of new characters, leading to comedic and heartwarming situations as they work together to achieve success in the light novel industry.