Eromanga Sensei (エロマンガ先生) is a Japanese light novel series written by Tsukasa Fushimi and illustrated by Hiro Kanzaki. ASCII Media Works has Characters · Media · Manga · Anime. A description of tropes appearing in Eromanga Sensei. Masamune Izumi is a boy who enjoys writing light novels. Lacking artistic skill, his novels were . The “new sibling romantic comedy” revolves around Masamune Izumi, a light novel author in high school. Masamune's little sister is Sagiri, a shut-in girl who.