Eromanga Sensei

Sagiri Izumi and Masamune Izumi became step-siblings one year ago, but their new family's life was cut short when their parents passed away. This led to Sagiri's isolation, causing her to sever ties with her brother and the outside world.

As an aspiring author, Masamune earns a living by writing light novels, but his partnership with Eromanga-sensei, a famous illustrator notorious for her explicit artwork, remains a secret. It eventually comes to light that Masamune's illustrator is, in fact, his own younger sister Sagiri.