エロマンガ先生 OVA

Light-novel author Masamune Izumi shares a house with his shut-in stepsister Sagiri, who rarely leaves her room and who, he discovers, is the elusive illustrator Eromanga-sensei drawing the covers for his books. These two OVA episodes sit alongside the TV series rather than continuing it: in one, rival author Elf Yamada throws a party over her anime deal; in the other, Sagiri leaves her room to look after a sick Masamune.